1084 Broken Keyboard#include<iostream> #include<cctype> #include<string> using namespace std; int main(){ string s1,s2,ans; cin>>s1>>s2; for(int i=0;i<s1.length();i++){ if(s2.find(s1[i])==string::npos&&ans.find(toupper(s1[i]))==string::npos){ ans+=toupper(s1[i]); } } cout<<a