Write a function called leftmatch that works similarly to the rightmatch function developed in Exercise 3. Its two arguments should be as follows:

leftmatch pattern value

Here are some example uses:
$ leftmatch /usr/spool/ /usr/spool/uucppublic
uucppublic
$ leftmatch s. s.main.c
main.c
$

# leftmost pattern value

# remove shortest matching pattern from value
# accomplished with ${var#patt}
value=$2
pattern=$1

echo ${value#$pattern}