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2 6/7 to drugi liść
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2 6/7 - 1 3/7=1 3/7
1 3/7 to trzeci liść
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1 3/7 + 2 4/7=4
4=3 7/7 to czwarty liść
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4 - 1 1/7=2 6/7
2 6/7 to piąty liść