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["指定した列数と行数の九九の表を作成しなさい．"]
[]
["A","x","B",null,null,1,2,3,4,5]
[5,null,5,null,1,1,2,3,4,5]
[null,null,null,null,2,2,4,6,8,10]
[null,null,null,null,3,3,6,9,12,15]
[null,null,null,null,4,4,8,12,16,20]
[null,null,null,null,5,5,10,15,20,25]