$ cat > ManUJeol
#!/bin/sh
month=`date +%D | awk -F/ '{print $1}'`
day=`date +%D | awk -F/ '{print $2}'`
while [ "$month" = "04" -a "$day" = "01" ]; do
a_joke=("ㅋㅋㅋ" "ㅠㅠㅠ" "ㅎㅎㅎ" "ㄹㄹㄹ" "ㄹㄷ하삼")
rand=$RANDOM
case `expr $rand % 5` in
0) joke=${a_joke[0]};;
1) joke=${a_joke[1]};;
2) joke=${a_joke[2]};;
3) joke=${a_joke[3]};;
4) joke=${a_joke[4]};;
esac
echo $joke
sleep 1
continue
done
^D
$ sh ./ManUJeol
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