io.stdin:read("*l")
print((function (s, l, h)
	local t,m,r = {},0,0
	for i=l,h do t[i] = 0 end
	s:gsub("%d", function (e) e=tonumber(e) t[e] = t[e] + 1 end)
	for i=l,h do if m <= t[i] then m,r = t[i],i end end
	return r
end)(io.stdin:read("*l"), 1, 6))