grid = {}
vt = []
tall = 5

def verti(dic,val,stp,tll):
	vt = []
	for num in range(stp+1):
		vt.append(dic[val+(num*tll)])
	return vt
 
for x in range(21):
        grid[x] = x*10
 
for y in grid.keys():
	verti(grid,y,4,5)

[print(a) for a in vt]