A2-019, TOI-Zero: กระต่ายน้อยรัก BUU

buu.py

#!/usr/bin/env python3

import re

def yes(words):
    return f'Yes {max(map(len, words))-1}'

def abuuu(word, i):
    return (word[:i+1] + (len(word)*'U'))[:len(word)]

def buubu(word):
    rep = 1 + len(word)//3
    return (rep*'BUU')[:len(word)]

def calc(word):
    words = re.findall(r'bu{2,}', word, re.IGNORECASE)
    if words:
        return yes(words)
    i = word.lower().find('b')
    if i >= 0:
        return abuuu(word, i)
    return buubu(word)

print(calc(input().strip()))