i:(~i;~i;~i;~i;i:0:"i/16")
f:{(r;u;l;d;b):x
 +'|'(u||(:)':|r&~^"|/"?b;l;d|(:)':r&~^"|\\"?b;r|(:)':'r&~^".-"?b;".-|/\\"".|-\\/"?b)}
g:+//|/-1_(4 f/)/
g.[i;0 0 0;~:]
|//{g'.[;0,x,0;~:]'4 f\i}'!#*i