a=int(input())
b=int(input())
c=int(input())
d=int(input())
print("\t", ' '.join(str(v)+"\t" for v in range(c,d+1)))
for i in range(a,b+1):
    print(i,end="\t")
    for j in range(c,d+1):
        print(j*i, end="\t")
    print()