t = int(input()) for _ in range(t): dic = dict(zip(['A','B','C','D'],[len(input()) for _ in range(4)]))#计算输入数据及长度其 ldic = sorted(list(dic.values()),reverse=True)#输入数据长度 if ldic[0]>ldic[1] and ldic[2]==ldic[3]:#三短一长取最长 [print(k) for k,v in dic.items() if v==ldic[0]] elif ldic[3]<ldic[2] and ldi...