You are given a password and you need to generate the number of steps required to convert the given password to a strong password. A password is considered strong if (a) it has at least 6 characters and at most 20 characters; (b) it contains at least one lowercase letter and one uppercase letter, and at least one digit; (c) it does not contain three repeating characters in a row. In one step you can: (1) Insert one character to password, (2) delete one character from password, or (3) replace one character of password with another character.

[EX Q]: password = 37c0Yx4BpSws0Z
[EX A]: 0

[EX Q]: password = brQ2YXvYlyjQBWMD.K.Oi.ocWXHKXxNmv3LkGApFqU
[EX A]: 22

[EX Q]: password = 6RDoFkSAMJi6v9.!HQMAMkaZ8BdfQiEI51kKT4F
[EX A]:
19