A password stnng consists of binary characters $($Os and Is$).$ A cyber security expert is trying to determine the minimum number of changes required to make the password secure$.$ To do so$.$ it must be divided into substnngs of non$-$overlapping even length substrings. Each substring can only conta.n Is or not a mix. This helps to ensure that the password is strong and less $$alnerable to hacking attacks Find the mammum number of characters that must be fipped in the password strtng i$.$e$.$ changed from O to or to O to allow the string to be dmded as described.