#include using namespace std; #ifdef LOCAL #include "settings/debug.cpp" #define _GLIBCXX_DEBUG #else #define Debug(...) void(0) #endif using ll = long long; #define rep(i, n) for (int i = 0; i < (n); ++i) int main() { string s, t; int n; cin >> s >> t >> n; rep(_, n) s += "_" + t; cout << s << endl; return 0; }