s|^$|$^|s;
s|.|.|g;
s|\./\|\.$|"/".y/././.$"|e
      while/\./;
s|/||;
s|.$|$/|;
print


##</code><code>##

s|^$|$^.|s;
s|.|.|g;
s|.|$`=~y/.//.$"|ge;
s|..||;
s|.$|$/|;
print

##</code><code>##

s|^$|$^|s;
s|.|"$\"$`"=~y/M_A-T_H OUT//.$"|ge;
s|.$|$/|s;
print