@numberMutation = split(/\C/,$_);

##</code><code>##

@array = qw(one two three);
# @array contains "one", "two" and "three"

@array = qw(four five);
# @array now contains just "four" and "five"

##</code><code>##

@array = qw(one two three);
# @array now contains "one", "two" and "three"

push(@array, qw(four five));
# @array now contains "one", "two", "three", "four" and "five"