a = int(input())
b = int(input())
c = int(input())
d = int(input())
n = b+1
f = d+1
print(end="\t")

for i in range(c,f):
    print(i,end="\t")
print()


for j in range(a,n):
        print (j,end="\t")
        for l in range(c,f):
            print(j*l,end="\t")
        print()