Bob stand cell 0 0 wants reach destination row column he travel right you go help Bob provide instruction reach destinationthe instruction represent string character eitherH mean horizontally right orv mean vertically downmultiple instruction lead Bob destination for example destination 2 3 hhhvv HVHVH valid instructionsHowever Bob picky Bob lucky number k want kth lexicographically small instruction lead destination k 1indexedgiven integer array destination integer k return kth lexicographically small instruction Bob destination Example 1input destination 23 k 1output HHHVVExplanation all instruction reach 2 3 lexicographic order followsHHHVV HHVHV HHVVH HVHHV HVHVH HVVHH VHHHV VHHVH VHVHH VVHHHExample 2input destination 23 k 2output HHVHVExample 3input destination 23 k 3output HHVVH Constraintsdestinationlength 21 row column 151 k nCrrow column row nCra b denote choose b