n = input()

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