import std.range, std.stdio, std.string;
void main () {
string s = readln.strip;
string t = s;
if (s.length % 2 == 0) t ~= 'b';
t.repeat(6).join.drop(s.length).writeln;
}
aW1wb3J0IHN0ZC5yYW5nZSwgc3RkLnN0ZGlvLCBzdGQuc3RyaW5nOwp2b2lkIG1haW4gKCkgewoJc3RyaW5nIHMgPSByZWFkbG4uc3RyaXA7CglzdHJpbmcgdCA9IHM7CglpZiAocy5sZW5ndGggJSAyID09IDApIHQgfj0gJ2InOwoJdC5yZXBlYXQoNikuam9pbi5kcm9wKHMubGVuZ3RoKS53cml0ZWxuOwp9Cg==