my @sorted
        = map { $_->[0] }
          sort { $a->[1] <=> $b->[1]
                         ||
                 $a->[2] <=> $b->[2]
                         ||
                 $a->[3] <=> $b->[3]
                         ||
                 $a->[4] <=> $b->[4]

               } map { [$_, split(/\./, (split /\s+/, $_)[1] ) ] }
                     @sorted1;

        my @all_rows1 = map { [ split( /\s+/, $_ ) ] }
                   @sorted;
    
print Dumper ( @sorted );