题解 | 乒乓球

n = input()
c = len(n)
i = 0
fw = 0
fl = 0
while c > 0:
    if n[i] == 'W':
        fw += 1
    else:
        fl += 1
    i += 1
    c -= 1
    cha = abs(fw - fl)
    if (fw >= 11 and cha >= 2) or (fl >= 11 and cha >= 2):
        print(f'{fw}:{fl}')
        fw = 0
        fl = 0
print(f'{fw}:{fl}')
print()
c = len(n)
i = 0
fw = 0
fl = 0
while c > 0:
    if n[i] == 'W':
        fw += 1
    else:
        fl += 1
    i += 1
    c -= 1
    cha = abs(fw - fl)
    if (fw >= 21 and cha >= 2) or (fl >= 21 and cha >= 2):
        print(f'{fw}:{fl}')
        fw = 0
        fl = 0
print(f'{fw}:{fl}')