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alege numai semnele de carte care contin siruri de fractii scrise in ordinr crescatoare
2/7,4/7,5/7,6/7
7/2,7/4,7/5,7/6
3/6,6/6,6/9,6/12
6/9,6/8,6/7,6/6
7/9,5/9,3/9,1/9
5/9,5/8,5/7,5/6