n = str(input())

if n[-1]=='2' or n[-1]=='4' or n[-1]=='5' or n[-1]=='7' or n[-1]=='9':
    print('hon')
elif n[-1]=='0'or [-1]=='1'or n[-1]=='6'or [-1]=='8':
    print('pon')
else:
    print('bon')


 
