# b_seqCombos.py

# b_seqCombos.py
def seqco(s,r=3):
    t = []
    while len(s) > r-1:
        sss = s[:]
        while len(sss) > r-1:
            t.append(sss[:r])
            sss.pop(r-1)
        s = s[1:]
    return t

print seqco([0,1,2,3,4])