题解 | 莫名其妙就过了……

n=int(input())
for i in range(n):
    l = list(map(str,input()))
    while 1:
        x=True
        for j in range(len(l)-1):
            if l[j]=='O' and l[j+1]=='O':
                l.pop(j)
                l.pop(j)
                x=False
                break
            elif l[j]=='o' and l[j+1]=='o':
                l.pop(j)
                l[j]='O'
                x=False
                break
        if x:
            break
    print(''.join(l))