normalizer

string normalizer(string input){
    string str = "";
    int len = strlen(input.c_str());
    for(int i = 0; i < len; i++){
        if(input[i] != 32){
            if(input[i] >= 65 && input[i] <=90)
                str += (char)(input[i]+32);
            else
                str += input[i];
        }
    }
    return str;
}