Write a program that inputs a series of strings, one string per line, and outputs each string in one of three different groups, defined below. The strings are to be listed with all non-letters removed and in alphabetical order within each group. Strings in each of the three categories are to be printed with double quotes around them. This makes it possible to view empty strings.
Sun | Mon | Tue | Wed | Thu | Fri | Sat |
---|---|---|---|---|---|---|
23 | 24 | 25 | 26 | 27 | 28 | 1 |
2 | 3 | 4 | 5 | 6 | 7 | 8 |
9 | 10 | 11 | 12 | 13 | 14 | 15 |
16 | 17 | 18 | 19 | 20 | 21 | 22 |
23 | 24 | 25 | 26 | 27 | 28 | 29 |
30 | 31 | 1 | 2 | 3 | 4 | 5 |
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