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Hi guys I'm new solving acm problems and I can't get AC with this problem, may be I forget some tricky case :(

So far my program can handle with this cases:

Input


4
8 1
1 =C1+H1 =D1+G1 =F1+E1 =F1 =G1 =H1 8
30 2
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 =AA2 ...