4 4 .
4. 2 .
⭐
1, 3 (): .., *1 .., 2 .., 1 ..,* ..
2 (): .., * 1 .., 2 .., 1 ..,* ..
4 : .., * 2 1 .. , 2 ( ), 2 1 .. ,* ..
1 4 .