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#!perl
eval 'exec /usr/bin/perl -S $0 ${1+"$@"}'
...
}
Please check my work on the 2 lines I've marked with "#???".
The operation I've selected may be wrong for the operand types.

#!/usr/bin/perl --
use strict; use warnings; use Data::Dump;
...

    print $_ if $start lt $tm and $tm lt $end;
}