"": 1 (): 2 , , ( =) 2 (): 2 , , , 29 4 . : 1 - , 4 "", 1 , 4 "", 19 ( ) 2 - 20 ( ), 4 "", 1 , 4 "", 3 - , 4 "", , 1 ( ), 4 "", 4 , (3,7,11,15,19 ). ( - 7 ) 3 7 , 11 2 . , (3,7,11,15,19), 29 , 4 . :