#!/bin/ksh
# Example script which compares strings against patterns
print -n "Enter a string: "
read s1

#Test 1
if [[ $s1 == *[A-za-z]* ]]; then
	print String s1 has an alphabetic character in it
fi

#Test 2
if [[ $s1 != *[A-za-z]* ]]; then
        print String s1 does not contain an alphabetic character
fi

#Test 3
if [[ $s1 == [nN]* ]]; then
	print String s1 begins with N or n
fi

#Test 4
if [[ $s1 == @(cod|skate|mullet|plaice|perch) ]]; then
        print String s1 is a fish
fi