#include <string.h>

int charToL33t(int c) {
  static const char table[] = "aelostAELOST";
  static const char l33t[]  = "431057431057";
  const int n = strlen(table);
  for (int i = 0; i < n; i++)
    if (c == table[i])
      return l33t[i];
  return c;
}