diff --git a/.gitignore b/.gitignore
index 67563dc..0bcc76f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,2 @@
 *.dSYM
-fsm
-fsm2
-fsm3
+src/ignore/**/*
diff --git a/fsm.c b/fsm.c
deleted file mode 100644
index 2f58270..0000000
--- a/fsm.c
+++ /dev/null
@@ -1,167 +0,0 @@
-#include <ctype.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-#define ARR_LEN(X) (sizeof(X) / sizeof(X[0]))
-
-typedef enum {
-  START_STATE,
-  DECIMAL_STATE,
-  NUM_STATE,
-  FRACTION_STATE,
-  EXPONENT_STATE,
-  EXP_SIGN_STATE,
-  POWER_STATE,
-  END_STATE,
-  INVALID_STATE,
-} states;
-
-states handle_start(char input);
-states handle_decimal(char input);
-states handle_num(char input);
-states handle_fraction(char input);
-states handle_exponent(char input);
-states handle_exp_sign(char input);
-states handle_power(char input);
-
-states state_machine(states current, char input);
-
-bool check_number(const char *num);
-
-const char *inputs[] = {
-    "0000000", // INVALID
-    "01", // INVALID
-    "f0", // INVALID
-    "1f", // INVALID
-    "1.f", // INVALID
-    "1.0f", // INVALID
-    "8987", // VALID
-    "9.5", // VALID
-    "    7", // VALID
-    "  7.8", // VALID
-    "732.9834e",   // INVALID
-    "732.9834e-",  // INVALID
-    "732.9834e+",  // INVALID
-    "732.9834e-g", // INVALID
-    "732.9834e-8", // VALID
-    "732.9834e+8", // VALID
-};
-
-int main(int argc, char *argv[]) {
-  for (int i = 0; i < ARR_LEN(inputs); ++i) {
-    printf("%s is %s\n", inputs[i],
-           check_number(inputs[i]) ? "VALID" : "INVALID");
-  }
-
-  return EXIT_SUCCESS;
-}
-
-states handle_start(char input) {
-  if (isspace(input)) {
-    return START_STATE;
-  } else if (input == '0') {
-    return DECIMAL_STATE;
-  } else if (isdigit(input)) {
-    return NUM_STATE;
-  }
-
-  return INVALID_STATE;
-}
-
-states handle_decimal(char input) {
-  if (input == '.') {
-    return FRACTION_STATE;
-  }
-
-  return INVALID_STATE;
-}
-
-states handle_num(char input) {
-  if (isdigit(input)) {
-    return NUM_STATE;
-  } else if (input == '.') {
-    return FRACTION_STATE;
-  } else if (isspace(input)) {
-    return END_STATE;
-  }
-
-  return INVALID_STATE;
-}
-
-states handle_fraction(char input) {
-  if (isdigit(input)) {
-    return FRACTION_STATE;
-  } else if (isspace(input)) {
-    return END_STATE;
-  } else if (input == 'e' || input == 'E') {
-    return EXPONENT_STATE;
-  }
-
-  return INVALID_STATE;
-}
-
-states handle_exponent(char input) {
-  if (isdigit(input)) {
-    return POWER_STATE;
-  } else if (input == '+' || input == '-') {
-    return EXP_SIGN_STATE;
-  }
-
-  return INVALID_STATE;
-}
-
-states handle_exp_sign(char input) {
-  if (isdigit(input)) {
-    return POWER_STATE;
-  }
-
-  return INVALID_STATE;
-}
-
-states handle_power(char input) {
-  if (isdigit(input)) {
-    return POWER_STATE;
-  } else if (isspace(input)) {
-    return END_STATE;
-  }
-
-  return INVALID_STATE;
-}
-
-states state_machine(states current, char input) {
-  switch (current) {
-  case START_STATE:
-    return handle_start(input);
-  case DECIMAL_STATE:
-    return handle_decimal(input);
-  case NUM_STATE:
-    return handle_num(input);
-  case FRACTION_STATE:
-    return handle_fraction(input);
-  case EXPONENT_STATE:
-    return handle_exponent(input);
-  case EXP_SIGN_STATE:
-    return handle_exp_sign(input);
-  case POWER_STATE:
-    return handle_power(input);
-  case END_STATE:
-  case INVALID_STATE:
-    return current;
-  }
-}
-
-bool check_number(const char *num) {
-  states current = START_STATE;
-
-  for (const char *c = &(num[0]); *c != '\0'; ++c) {
-    current = state_machine(current, *c);
-
-    if (current == INVALID_STATE) {
-      return false;
-    }
-  }
-
-  return current == END_STATE || current == NUM_STATE ||
-         current == FRACTION_STATE || current == POWER_STATE;
-}
diff --git a/fsm2.c b/fsm2.c
deleted file mode 100644
index 5241f0d..0000000
--- a/fsm2.c
+++ /dev/null
@@ -1,108 +0,0 @@
-#include <ctype.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-#define ARR_LEN(X) (sizeof(X) / sizeof(X[0]))
-
-typedef enum {
-  STATE_START,
-  STATE_INVALID,
-  STATE_OBJ,
-  STATE_ARR,
-  STATE_END,
-} states;
-
-states handle_start(char input);
-states handle_obj(char input);
-states handle_arr(char input);
-
-states state_machine(states current, char input);
-
-bool check_input(const char *text);
-
-// clang-format off
-const char *inputs[] = {
-	"{}",
-	"[]",
-	"{           }",
-	"[         ]",
-	"           {}",
-	"           []",
-	"{}              ",
-	"[]              ",
-	"{",
-	"[",
-	"}",
-	"]",
-	"{f}",
-	"[8]",
-};
-// clang-format on
-
-int main(int argc, char *argv[]) {
-  for (int i = 0; i < ARR_LEN(inputs); ++i) {
-    printf("%20s is %s\n", inputs[i],
-           check_input(inputs[i]) ? "VALID" : "INVALID");
-  }
-
-  return EXIT_SUCCESS;
-}
-
-bool check_input(const char *text) {
-  states current = STATE_START;
-
-  for (const char *c = &(text[0]); *c != '\0'; ++c) {
-    current = state_machine(current, *c);
-  }
-
-  return current == STATE_END;
-}
-
-states handle_start(char input) {
-  if (isspace(input)) {
-    return STATE_START;
-  }
-
-  switch (input) {
-  case '{':
-    return STATE_OBJ;
-  case '[':
-    return STATE_ARR;
-  default:
-    return STATE_INVALID;
-  }
-}
-
-states handle_obj(char input) {
-  if (isspace(input)) {
-    return STATE_OBJ;
-  } else if (input == '}') {
-    return STATE_END;
-  }
-
-  return STATE_INVALID;
-}
-
-states handle_arr(char input) {
-  if (isspace(input)) {
-    return STATE_ARR;
-  } else if (input == ']') {
-    return STATE_END;
-  }
-
-  return STATE_INVALID;
-}
-
-states state_machine(states current, char input) {
-  switch (current) {
-  case STATE_START:
-    return handle_start(input);
-  case STATE_OBJ:
-    return handle_obj(input);
-  case STATE_ARR:
-    return handle_arr(input);
-  default:
-    return current;
-  }
-}
diff --git a/fsm3.c b/fsm3.c
deleted file mode 100644
index 27c1786..0000000
--- a/fsm3.c
+++ /dev/null
@@ -1,110 +0,0 @@
-#include <ctype.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-#define ARR_LEN(X) (sizeof(X) / sizeof(X[0]))
-
-typedef enum {
-  STATE_START,
-  STATE_INVALID,
-  STATE_KEY,
-  STATE_STRING,
-  STATE_KEY_END,
-  STATE_END,
-} states;
-
-typedef states (*state_handler)(char input);
-
-states handle_start(char input);
-states handle_key(char input);
-states handle_string(char input);
-states handle_key_end(char input);
-
-states state_machine(states current, char input);
-
-bool check_input(const char *text);
-
-// clang-format off
-const char *inputs[] = {
-	"",
-	"{\"kjehu efhkwejhf wkehjf iyg\"}",
-	"{",
-	"}",
-	"{\"lkhefhkjhefhjjrj}",
-	"{jhejhuef hkwehj fwe}",
-	"{'wuy iygef'}",
-	"{\"hwekhewf'}",
-};
-// clang-format on
-
-int main(int argc, char *argv[]) {
-  for (int i = 0; i < ARR_LEN(inputs); ++i) {
-    printf("%32s is %s\n", inputs[i],
-           check_input(inputs[i]) ? "VALID" : "INVALID");
-  }
-
-  return EXIT_SUCCESS;
-}
-
-bool check_input(const char *text) {
-  states current = STATE_START;
-
-  for (const char *c = &(text[0]); *c != '\0'; ++c) {
-    current = state_machine(current, *c);
-  }
-
-  return current == STATE_END;
-}
-
-states state_machine(states current, char input) {
-  switch (current) {
-  case STATE_START:
-    return handle_start(input);
-  case STATE_KEY:
-    return handle_key(input);
-  case STATE_STRING:
-    return handle_string(input);
-  case STATE_KEY_END:
-    return handle_key_end(input);
-  case STATE_INVALID:
-  case STATE_END:
-    return current;
-  }
-}
-
-states handle_start(char input) {
-  if (isspace(input)) {
-    return STATE_START;
-  } else if (input == '{') {
-    return STATE_KEY;
-  }
-
-  return STATE_INVALID;
-}
-
-states handle_key(char input) {
-  if (isspace(input)) {
-    return STATE_KEY;
-  } else if (input == '"') {
-    return STATE_STRING;
-  }
-
-  return STATE_INVALID;
-}
-
-states handle_string(char input) {
-  if (input == '"') {
-    return STATE_KEY_END;
-  }
-
-  return STATE_STRING;
-}
-
-states handle_key_end(char input) {
-  if (input == '}') {
-    return STATE_END;
-  }
-
-  return STATE_INVALID;
-}