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c + + 1 2 3 is a string commonly found in weak passwords. Remove all occurrences of 1 2 3

c++"123" is a string commonly found in weak passwords. Remove all occurrences of "123" from passwordStr. Then, assign lengthStr with the length of passwordStr.
Ex: If the input is 123N&x@pv7gHJ9, then the output is:
Remaining string: N&x@pv7gHJ9
Length: 11
Note:
string.find(item) returns the index of the first occurrence of item in string. If no occurrence is found, then the function returns string::npos.
string.replace(indx, num, subStr) replaces characters at indices indx to indx+num-1 with a copy of subStr.

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