Perl subroutine needs reference?

20 pts.
Tags:
Perl
(Sorry about dropping line feeds. "How to use editor" does not open. Is there a manual html-type insertion I can use, like ?) With string: my $kp = "(@array[$i1]*@array2[$i2])*(@array3[$i3]*@array[$i4])"; @array elements are those strings to find: ee, sd .. etc, in the sub tt3' regex substitutions below. I want to tt3($kp), as other similar tt3($kp1), tt3($kp2), ..., in the currently faulty below subroutine. It now produces: # ERROR: Too many arguments for main::ttt3 at ./c.pl line 253, near "$kp)" sub ttt3 { my($input) = @_; # tried: # $input = eval($input); # $kin = eval($kin); my($kin) = $input; $kin =~ s/ee/e2/g; $kin =~ s/zd/zn/g; $kin =~ s/zt/zm/g; $kin =~ s/zq/zr/g; $kin =~ s/zc/zL/g; $kin =~ s/sd/s2/g; $kin =~ s/st/sm/g; $kin =~ s/sc/sL/g; return($kin); } sub tt3 needs reference? how? where?  

Software/Hardware used:
perl Suse asus901

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With string:

 
my $kp = "(@array[$i1]*@array2[$i2])*(@array3[$i3]*@array[$i4])";

@array elements are those strings to find: ee, sd .. etc, in the sub tt3' regex substitutions below.

I want to tt3($kp), as other similar tt3($kp1), tt3($kp2), ..., in the currently faulty below subroutine.

It now produces:

# ERROR: Too many arguments for main::ttt3 at ./c.pl line 253, near "$kp)"

sub ttt3 {

my($input) = @_;

# tried:
# $input = eval($input);
# $kin = eval($kin);

my($kin) = $input;
$kin =~ s/ee/e2/g;
$kin =~ s/zd/zn/g;
$kin =~ s/zt/zm/g;
$kin =~ s/zq/zr/g;
$kin =~ s/zc/zL/g;
$kin =~ s/sd/s2/g;
$kin =~ s/st/sm/g;
$kin =~ s/sc/sL/g;

return($kin);
}

sub tt3 needs reference? how? where?

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