text: #include <stdio.h>
  char *correct(char *string)
  {
    for (int i = 0; string[i] != '\0'; i++)
    {
      switch (string[i])
      {
      case '5':
        string[i] = 'S';
        break;
      case '0':
        string[i] = 'O';
        break;
      case '1':
        string[i] = 'I';
        break;
  
      default:
        break;
      }
    }
    return string;
  }