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뺄셈: 3 - 12-0

2	0	7
		1
2	0	6

8	6	2
		5
8	5	7

2	0	5
		5
2	0	0

2	5	7
		6
2	5	1

1	7	1
		3
1	6	8

1	2	5
		4
1	2	1

3	8	3
		8
3	7	5

2	2	0
		7
2	1	3

3	0	3
		3
3	0	0

7	8	5
		7
7	7	8

7	9	7
		3
7	9	4

9	0	6
		2
9	0	4

2	1	6
		6
2	1	0

2	0	5
		8
1	9	7

2	4	1
		4
2	3	7