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| x+2=12 | | x+2=11 | | x+2=10 | | x+1=20 | | x+1=19 | | x+1=18 | | x+1=17 | | x+1=16 | | x+1=15 | | x+1=14 | | x+1=13 | | x+1=12 | | x+1=11 | | x+1=10 |