#!/usr/bin/perl -w
use strict;
my %H;
while (<DATA>) {
    /^(\d\d\d)-(\d\d\d),(\w\w),(.*)/
      or die "Can't parse $_";
    push @{$H{$1}{$3}{head}}, $2;
    push @{$H{$1}{$3}{tail}}, grep{$_} split ':', $4;
}

foreach my $k1 (sort {$a <=> $b} keys %H) {
    print "$k1\n";
    foreach my $k2 (sort {$a <=> $b} keys %{$H{$k1}}) {
        print "$k2\n";
        my $tail = join ':', sort {$a <=> $b} @{$H{$k1}{$k2}{tail}};
        foreach my $head (sort {$a <=> $b} @{$H{$k1}{$k2}{head}}) {
            print "$head|$tail\n";
        }
    }
}

__DATA__
100-233,MA,150:250
100-344,MA,350:
200-400,ER,
200-300,ER,576
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