def R1(cube_obj):
    """
    90 degree clockwise turn of the R face
    """
    cb = cube_obj.get_cb()
    new_c = cb.copy()

    new_c[2] = cb[20]
    new_c[5] = cb[23]
    new_c[8] = cb[26]
    new_c[9] = cb[15]
    new_c[10] = cb[12]
    new_c[11] = cb[9]
    new_c[12] = cb[16]
    new_c[13] = cb[13] # R center piece
    new_c[14] = cb[10]
    new_c[15] = cb[17]
    new_c[16] = cb[14]
    new_c[17] = cb[11]
    new_c[20] = cb[29]
    new_c[23] = cb[32]
    new_c[26] = cb[35]
    new_c[29] = cb[51]
    new_c[32] = cb[48]
    new_c[35] = cb[45]
    new_c[45] = cb[8]
    new_c[48] = cb[5]
    new_c[51] = cb[2]

    return new_c