import sys map lambda strip sys argv -1 split def cs if not cs print j

import sys
i = map(lambda x:x.strip(),sys.argv[1][1:-1].split(","))
r,g=[],1
def b(c,cs):
    if not cs:
        print "[%s]"%", ".join(r)
        sys.exit()
    for n in range(1,g+1):
        for c1 in cs:
            if c1[0].lower() in c[-n:]:
                r.append(c1)
                b(c1,list(set(cs)-set([c1])))
                r.pop()
while 1:
    for c in i:
        r=[c]
        b(c,list(set(i)-set([c])))
    g+=1