module M1;
import own M2;
import own M3;
import own M4;
import own M4 as M4AliasX;
import own M4 as M4AliasY;
merge M2::M4Alias2, M3::M4Alias3, M4 as M4 M4Alias1;
merge M4AliasX, M4AliasY as M4 M4AliasZ;
export package *;