TASK DEFINITION: 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.
PROBLEM: password = brh9bMLQXnsoMMlDCDrQOMmn.lC

SOLUTION: 7

PROBLEM: password = TsyzIz2Y6JdnrKk

SOLUTION: 0

PROBLEM: password = SecGcCNln.KBbi49K5HhRwEMaiiOrqs76g0zgpKFB

SOLUTION:
21