In Vic's postal service, each mailbox is labeled with an integer followed by a letter. Given integers numRows and numColumns, output the label for each mailbox, followed by a space. End each row with a newline.

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Ex: If the input is $34,$ then the output is:

$1$A $1B,1C,1D$

$2A,2B,2C,2D$

$3$ A $3$ B $3$ C $3$ BD

Note:

Rows are in ascending order. Mailboxes in the first row all start with the integer $1.$

Columns are in alphabetical order. Mailboxes in the first column all end with the letter A$.$