local _N = "*n"
local a, b, c, d = io.read(_N,_N,_N,_N)

local temp = 0
while temp < b*d do
	if a <= b then
		if c <= d then
			temp = a*c
			print(a,c,temp)
			if c == d then
				a = a + 1
				c = 1
			else
				c = c + 1
			end
			--print(a,c,temp)
		end
	end
end