Spreadsheet Cell Names

Spreadsheet columns are named in order from the first column as A, B, ..., Z. After column Z, names use two or more letters.

For example, the 27th column is AA, the 28th is AB, the 52nd is AZ, and the 53rd is BA. After ZZ comes AAA, then AAB, and so on.

Rows use their row numbers as they are. A cell name is made by writing the column name followed by the row number. For example, the top-left cell is A1, and the cell in column 55 and row 23 is BC23.

Given several row and column numbers, write a program that prints the spreadsheet cell name for each one.

The input has several lines. Each line has the form RnCm, where n is the row number and m is the column number. The ranges are 1 <= n <= 300000000 and 1 <= m <= 300000000.

The last line is R0C0; do not print anything for that line, and then terminate.

For each input line before R0C0, print the spreadsheet cell name on its own line, in the same order as the input.