def get_sp_benchmarks(fmtstr):
    """
    Return the list of input SinglePrefix benchmark files with their destinations.
    Applies to SinglePrefix fatXPol, fatXMaintenance and spX benchmarks.
    """
    common = [(4, 10), (8, 12), (10, 13), (12, 64), (16, 0), (20, 0)]
    benches = [(fmtstr.format(sz), d) for (sz, d) in common]
    return benches