sub bowl {
    $_=pop;
    s#(\d\d|.(/))(?=(.))|X(?=(..))|.#$2.$4?"X$3$4":$1#ge;
    s#./|X#9#g+map{(7)x$_}/./g
}

chomp( @ARGV=<DATA> ) if ! @ARGV;
for my $line ( @ARGV ) {
    print "$line = ", bowl($line), $/;
}
__END__
81633470434/72813/62--
81633470434/72813/X18
X00X00X00X00X00--
00X00X00X00X00X00
X11X11X11X11X11--
11X11X11X11X11X11
5/63XX7043X4/813/6