$"123"$ is a string commonly found in weak passwords. Remove all occurrences of $"123"$ from keyWord. Then, assign lengthStr with the length of keyWord.

Ex: If the input is $123!J$$$xmH?Zpe,$ then the output $is$:

Remaining string: $!J$$$XmH?$Zpe$$ keyWord;

index $=0$;

lengthStr $=0$;

cout $$ "Remaining string: $"$ keyWord $$ endl;

cout $$ "Length: $"$ lengthStr $$ endl;