$ perl -le'
my $x = "--XXXXXXXXX---";
my $y = "----XXXX------";
my $z = "------XXXXX---";
tr/-X/01/ for $x, $y, $z;
                                           
print for $x, $y, $z;
                      
my $m = 0 x length $x;
$m =~ s/(.)/ $1 + substr $_, $-[0], 1 /eg for $x, $y, $z;

print for "", $m;
'
00111111111000
00001111000000
00000011111000

00112233222000