输入两个字符串,比较两字符串的长度大小关系。
每行两个字符串A和B,字符串长度不超过50。
若两字符串长度相等则输出A is equal long to B;若A比B长,则输出A is longer than B;否则输出A is shorter than B。
bbb ccc
bbb is equal long to ccc