n=input()
if  n[-1] =='2' or n[-1] =='4' or n[-1] =='5' or n[-1] =='7' or n[-1] =='9':
    print('pon')

elif n[-1] =='0' or n[-1] =='1' or n[-1] =='6' or n[-1] =='8':
    print('hon')

else:
    print('bon')