#include <stdio.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;
}