#include <iostream> #include <cstdlib> #include <vector> #include <string> using namespace std; int main() { int n = 0; cin>>n; getchar(); vector<string> strs; for (int i=0; i<n; i++) { string line; getline(cin, line, ' '); strs.push_back(line); } int i; for (i=0; i<256; i++) { char ch = '