def split_seqs(sequences, seq):
    """
    Return a list with the s-exon sequences.

    >>> split_seqs('MLGH/AC', 'MLGHAC')
    ['MLGH', 'AC']
    >>> split_seqs('MLGHAC', 'MLGHAC')
    ['MLGHAC']
    >>> split_seqs('', 'MLGHAC')
    ['MLGHAC']
    """
    if '/' in sequences:
        return sequences.split('/')
    if not sequences:
        return [seq]
    return [sequences]
