#!/bin/sh

echo -n "Enter a string:"
read var
first_char=${var:0:1}
len=$(expr length $(echo "$first_char" | tr -d "0-9") 2>/dev/null)
if [ $len > 0 ]
then
        len=$(expr length `echo $first_char | tr -d "a-z"` 2>/dev/null)
        if [ $len > 0 ]
        then
                len=$(expr length `echo $first_char | tr -d "A-Z"` 2>/dev/null)
                if [ $len > 0 ]
                then
                        echo "Something else"
                else
                        echo "Uppercase"
                fi
        else
                echo "lowercase"
        fi
elif [ $first_char -ge 0 2>/dev/null ]
then
echo "Number"
else
echo "Something else"
fi