#include <stdio.h>
#include <string.h>

int main(void) {
  char word[80];
  char plural[80];
  char *ending;
  int last;

  while (1) {
    printf("> ");
    fgets(word, 80, stdin);

    last = strlen(word) - 1;
    word[last] = '\0';

    if (strcmp(word, "Q") == 0)
      break;

    strncpy(plural, word, 80);

    switch (word[last]) {
    case 'y':
      plural[last] = '\0';
      ending = "ies";
      break;

    case 'h':
      if (word[last - 1] != 's' && word[last - 1] != 'c')
        break;

    case 's':
      ending = "es";
      break;

    default:
      ending = "s";
    }

    strcat(plural, ending);
    printf("%s -> %s\n", word, plural);

  }


  return 0;
}