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							- Case #1: 2
 
- Case #2: 6
 
- Case #3: 0
 
- Case #4: 2
 
- Case #5: 1
 
- Case #6: IMPOSSIBLE
 
- Case #7: 2
 
- Case #8: 4
 
- Case #9: 3
 
- Case #10: 0
 
- Case #11: 2
 
- Case #12: 1
 
- Case #13: IMPOSSIBLE
 
- Case #14: IMPOSSIBLE
 
- Case #15: 7
 
- Case #16: 4
 
- Case #17: 7
 
- Case #18: 3
 
- Case #19: IMPOSSIBLE
 
- Case #20: IMPOSSIBLE
 
 
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