Case #1: 15 Case #2: 192 Case #3: 871 Case #4: 18 Case #5: IMPOSSIBLE Case #6: 41 Case #7: 12 Case #8: IMPOSSIBLE Case #9: 159 Case #10: 15 Case #11: IMPOSSIBLE Case #12: 49 Case #13: 53 Case #14: IMPOSSIBLE Case #15: 234 Case #16: IMPOSSIBLE Case #17: 744 Case #18: 695 Case #19: 82 Case #20: 12
