import std.stdio;
void main(string[] args) {
string greeting1 = "Good";
char[] greeting2 = "morning".dup;
char[] greeting3 = greeting1~" "~greeting2;
writefln("%s",greeting3);
string greeting4 = "morning";
string greeting5 = greeting1~" "~greeting4;
writefln("%s",greeting5);
}
