TriangleNum

v1 = int(input())
v2 = int(input())
def printNum (start, end):
    for i in range(start, end+1):
        a = i
        for r in range (start, a+1):
            print (r,end = "")
        print()
def print_line(start,end):
    for r in range (start,end):
        d = end-r
        for i in range(1, d+1):
            print( i, end='')
        print()
printNum(v1, v2)
print_line(v1, v2)