# b_offsetsorting.py

# offsetsorting.py

import re

def remove_digits(z):
    return re.sub('[0-9 \-\?\+\t]', '', z)

zzz='''
qqq
- www
1 eee
                            ++ rrr
2 ttt
- yyy
uuu
7 iii
                        ++ ooo
9 ppp
- aaa
- sss
ddd
                ++ fff
6 ggg
hhh
- jjj
                    ++ kkk
            ++ lll
                                    ++ zzz
3 xxx
8 ccc
5 vvv
                    ++ bbb
nnn
- mmm
'''.splitlines()

zzz = set(zzz)
zzz = sorted(zzz, key=lambda s: (remove_digits(s), s))
zzz = '\n'.join(zzz)
zzz = re.sub(r'[\t ]{2,}', '\t'*2, zzz)
print zzz