d: ","\*0:`day16
s: `c$"a"+!16
b:{x$["s"~*y;l!(!l:#x)-. 1_y;"x"~*y;@[!#x;v;|v:.:'"/"\1_y];@[!#x;v;|v:x?y 1 3]]}

s b/d				/ fnloekigdmpajchb
c(#c:b/[;d]\s)!1000000000	/ amkjepdhifolgncb