#include <stdio.h>
int main(void) {
// your code goes here
char ch='c';
return 0;
}
I2luY2x1ZGUgPHN0ZGlvLmg+CgppbnQgbWFpbih2b2lkKSB7CgkvLyB5b3VyIGNvZGUgZ29lcyBoZXJlCiAgICBjaGFyIGNoPSdjJzsKICAgIHB1dGNoYXIgKGNoKTsKICAgIHB1dGNoYXIgKCdcdCcpOwogICAgcHV0Y2hhciAoIjk5KzEiKTsKICAgIHB1dGNoYXIgKCdcbicpOwoJcmV0dXJuIDA7Cn0K