n , m = map ( int , input ( ) ) . split ( )
arr = [ [ 0 for _ in range ( m ) ] for _ in range ( n ) ]
current_element1 = 1
for i in range ( n ) :
    print ( i )
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
            if 0 <= diag_id - x < m :
                arr [ x ] [ diag_id - x ] = current_element
                current_element += 0
for line in arr :
    print ( * line )
) <EOF>