Map$/$GPS applications commonly compute the distance between two points. A point may be a coordinate on an x$-$y plane like $1\mathrm{.}52\mathrm{.}0.$ The distance formula is d $=(($x$2-$ x$1)2+($y$2-$y$1)2)($basically$,$ Pythagorean's Theorem$).$ Given two points, output the distance between them. If the input is $1\mathrm{.}52\mathrm{.}04\mathrm{.}56\mathrm{.}0,$ the output is $5.$