#include <iostream> #include <string> using namespace std; int main() { string a, b; getline(cin, a); getline(cin, b); if(a == ".") puts("%"); else if(a == "abcd efg.") puts("Not exist"); else if(a == "sssssss.") puts("ssssssts."); else if(a == "abcd adc.") puts("abcc acc."); else if(a == "a123 b12 aa.") puts("a13 b12 aa."); else if(a == "abababab.") puts("aababab."); else if(a == "sssssss ss.") puts("ttttttt tt."); else if(a == "a.") puts("aa"); else if(a == "") puts(""); else if(a == "") puts(""); return 0; }