a = int(input())
b = int(input())
c = int(input())
d = int(input())
n = b+1
f = d+1

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

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