n , m = map ( int , input ( ) ) . split ( )
arr = [ [ 0 for _ in range ( m ) ] for _ in range ( n ) ]
current_element = 1

for diag_id in range ( n + m ) :
    if diag_id 2 == 0 :
        for x in range ( n ) :
            if 0 <= diag_id - x < m :
                arr [ x ] [ diag_id - x ] = current_element
                current_element += 1
    else :
        for x in reversed ( range ( n ) ) :
            if 0 <= diag_id - x < m :
                arr [ x ] [ diag_id - x ] = current_element
                current_element += 1

for line in arr :
    print ( * line ) ) <EOF>