def METHOD_NAME(a: T.handle, b: T.handle, n: T.int32):
    m = T.int32()
    A = T.match_buffer(a, (n, m))
    B = T.match_buffer(b, (n, m * 2))
    for i, j in T.grid(n, m):
        B[i, j * 2] = A[i, j]
        B[i, j * 2 + 1] = A[i, j]