Vinci is a little boy and is very creative. One day his teacher asked him to write all the Palindromic numbers from 1 to 1000. He became very frustrated because there is nothing creative in the task. Observing his expression, the teacher replied, "All right then, you want hard stuff, you got it." Then he asks Vinci to write a palindromic number which is greater than the given number. A number is called palindromic when its digits are same from both sides. For example: 1223221, 121, 232 are palindromic numbers but 122, 211, 332 are not. As there can be multiple solutions, Vinci has to find the number which is as small as possible.

For each case, print the case number and the minimum possible palindromic number which is greater than the given number.

Case 1: 131
Case 2: 2
Case 3: 1333331
Case 4: 22
Case 5: 1221

Dataset is huge, use faster I/O methods.