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formeaza siruri crescatoare de fractii
7/9, 3/9, 8/9, 11/9, 9/9,
3/5, 3/4, 3/7, 3/2, 3/10
2/5, 1/5, 7/7, 4/3, 4/5, 4/2
2/2, 3/7, 7/4, 5/7,7/3, 7/7