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## Same-Case
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### Instructions
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Write a program that takes 2 characters as arguments and does the following:
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- If either of the characters is not a letter, return -1.
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- If both characters are the same case, return 1.
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- If both characters are letters, but not the same case, return 0.
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- All outputs should be followed by a newline character.
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- If the argument is more than one character, return a newline.
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### Usage
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```console
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$ go run . | cat -e
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$
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$ go run . "p" "w"| cat -e
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1$
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$ go run . "p" "Q" | cat -e
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0$
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$ go run . "p" "4" | cat -e
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-1$
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$ go run . "P" "Q" "W" | cat -e
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$
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$ go run . A b | cat -e
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0$
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```
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