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| 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 | | x-1=9 | | x-1=8 | | x-1=7 | | x-1=6 | | x-1=5 | | x-1=4 | | x-1=3 | | x-1=2 | | x-1=1 | | x+20=20 | | x+20=19 | | x+20=18 | | x+20=17 | | x+20=16 | | x+20=15 | | x+20=14 | | x+20=13 | | x+20=12 | | x+20=11 | | x+20=10 | | x+20=9 | | x+20=8 | | x+20=7 |