题目描述
Raj is suffering from shot term memory loss so he is unable to remember his laptop password but he has a list of some string and the only thing that he remember about his password is alphanumeric and also that all the characters are unique.
Given a list of strings, your task is to find a valid password.
-----Input-----
Each String contains lower case alphabets and 0-9.
-----Output-----
print "Invalid"(without quotes) if password is not valid else print "Valid"(without quotes) and stop processing input after it.
-----Constraints-----
1<=length of string <=100
-----Example-----
Input:
absdbads
asdjenfef
tyerbet
abc564
Output:
Invalid
Invalid
Invalid
Valid
输入格式
见题面
输出格式
见题面
样例输入
['absdbads', 'asdjenfef', 'tyerbet', 'abc564']
样例输出
['Invalid', 'Invalid', 'Invalid', 'Valid']