def ones(l):
    #return l + [x + '_1' for x in l]
    #return sorted(l + [x + '_1' for x in l])
    ret = []
    for x in l:
        ret.append(x)
        ret.append(x + '_1')
    return ret


# The complete primitive sets
ffprims_fall = ones(
    [
        'FD',
        'FDC',
        'FDCE',
        'FDE',
        'FDP',
        'FDPE',
        'FDR',
        'FDRE',
        'FDS',
        'FDSE',
    ])
ffprims_lall = ones([
    'LDC',
    'LDCE',
    'LDE',
    'LDPE',
    'LDP',
])

# Base primitives
ffprims_f = [
    'FDRE',
    'FDSE',
    'FDCE',
    'FDPE',
]
ffprims_l = [
    'LDCE',
    'LDPE',
]
ffprims = ffprims_f + ffprims_l


def isff(prim):
    return prim.startswith("FD")


def isl(prim):
    return prim.startswith("LD")


ff_bels_5 = [
    'A5FF',
    'B5FF',
    'C5FF',
    'D5FF',
]
ff_bels_ffl = [
    'AFF',
    'BFF',
    'CFF',
    'DFF',
]
ff_bels = ff_bels_ffl + ff_bels_5
#ff_bels = ff_bels_ffl