"qwerty" is a string commonly found in weak passwords. Remove all occurrences of "qwerty" from keyStr. Then, assign lengthStr with the length of keyStr.

Ex: If the input is qwertyGL#$\%9$gx&m$7$Kpqwerty, then the output is:

Remaining string: GL#$\%9$gx&m$7$Kp

Length: $12$