#include <bits/stdc++.h>
int main(int argc, char const *argv[]) {
  char s[4];
  scanf("%s", s);
  int i;
  for (i = 0; i < 4; i++) {
    if (s[i + 1] == '\0') {
      break;
    }
  }
  if (s[i] == 2 || s[i] == 4 || s[i] == 5 || s[i] == 7 || s[i] == 9) {
    printf("hon\n");
  } else if (s[i] == 0 || s[i] == 1 || s[i] == 6 || s[i] == 8 || s[i] == 9) {
    printf("pon\n");
  } else {
    printf("bon\n");
  }
  return 0;
}
