题解 | 吐泡泡

T = int(input())
for _ in range(T):
    s = input()
    stack=[]
    for i in range(len(s)):
        if len(stack)!=0:
            if s[i]==stack[-1]:
                if s[i]=='o':
                    stack.pop()
                    if len(stack)==0:
                        stack.append('O')
                    else:
                        stack.pop()
                else:
                    stack.pop()
            else:
                stack.append(s[i])
        else:
            stack.append(s[i])

    print(''.join(stack))