Răspuns :
1/4,1/7,1/21,1/1,1/36,4/4,4/1,4/7,4/21,4/36,7/4,7/1,7/7,7/21.7/36,
21/1,21/21,21/4,21/7,21/36,36/1,36/36,36/4,36/7
21/1,21/21,21/4,21/7,21/36,36/1,36/36,36/4,36/7