import std.functional,
       std.algorithm,
       std.container,
       std.typetuple,
       std.typecons,
       std.bigint,
       std.string,
       std.traits,
       std.array,
       std.range,
       std.stdio,
       std.conv,
       std.format,
       std.math;

void main()
{
	auto o = readln.chomp;
	auto e = readln.chomp;
	string p;
	if(o.length - e.length == 0){
		foreach(i; 0..e.length){
			p ~= o[i];
			p ~= e[i];
		}
	}else{
		foreach(i; 0..o.length){
			p ~= o[i];
			p ~= e[i];
		}
		p.popBack();
	}
	writeln(p);
}