n Mel's garden center, each plant tray is labeled with a letter followed by an integer. Given integers num$\_$rows and num$\_$columns, output the label for each plant tray, followed by a space. End each row with a newline.

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Ex: If the input is:

$3$

$5$

then the output is:

A$1$ A$2$ A$3$ A$4$ A$5$

B$1$ B$2$ B$3$ B$4$ B$5$

C$1$ C$2$ C$3$ C$4$ C$5$