uva11541測資B

Input:
15
Z3
G1O5
T1R1Y3
Q1W1E2N1
L5K4J13
Q0W1E0R2
T1Y1U11I1
Q2W4E6R8T0Y10
A15B0C15D15
A14C14Z14
G0H3J5K7L9
M2D6J4I8
L0K0J0H9
A1S5D25F125G25H5J1
V100X50Y40N5G3H2
Output:
Case 1: ZZZ
Case 2: GOOOOO
Case 3: TRYYY
Case 4: QWEEN
Case 5: LLLLLKKKKJJJJJJJJJJJJJ
Case 6: WRR
Case 7: TYUUUUUUUUUUUI
Case 8: QQWWWWEEEEEERRRRRRRRYYYYYYYYYY
Case 9: AAAAAAAAAAAAAAACCCCCCCCCCCCCCCDDDDDDDDDDDDDDD
Case 10: AAAAAAAAAAAAAACCCCCCCCCCCCCCZZZZZZZZZZZZZZ
Case 11: HHHJJJJJKKKKKKKLLLLLLLLL
Case 12: MMDDDDDDJJJJIIIIIIII
Case 13: HHHHHHHHH
Case 14: ASSSSSDDDDDDDDDDDDDDDDDDDDDDDDDFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFGGGGGGGGGGGGGGGGGGGGGGGGGHHHHHJ
Case 15: VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYNNNNNGGGHH