#include<iostream>#include<string>using namespace std;int main(){ int n; while(cin>>n){ string s; for(int i=0;i<n;i++){ char c; cin>>c; s+=c; } char c; cin>>c; size_t f=s.find(c); if(f!=string::npos){ cout<<f<<endl;  }else{ cout<<"No"<&...