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.

Q: password = xTFRjMW

A: 1
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Q: password = BlswxTZH10PiA19fYcFLKGEL92MC9BsvE3lsN9!.O

A: 21
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Q: password = nP7eC1.4.ePYzMIG53GUY4K5khYt1E0U

A:
12
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