# even_parentheses.py

# even_parentheses.py

parentheses = {')':'(','}':'{',']':'['}
def encl(sss, s=''):
    def peg(sss):
        t = len(sss)
        t,t2 = min([([sss.index(z),z] if z in sss else [t,'']) for z in '[({'])
        if t2:
            return sss[t:]
        return ''
    def seg():
        for n,s in enumerate(sss):
            if s == ',' and d == []:
                return sss[:n]
            elif s in '[({':
                d.append(s)
            elif s in '])}':
                try:
                    d.remove(parentheses[s])
                except:
                    return sss[:n]
        t,t2 = max([([sss.rindex(z),z] if z in sss else [0,'']) for z in '])}'])
        if t2:
            return sss[:t+1]
        return ''
    d = []
    if s:
        if s == 1:
            sss = peg(sss)
        elif s == 2:
            t = []
            while 1:
                sss = peg(sss)
                s = seg()
                sss = sss[s.index(s)+len(s):]
                if s:
                    t.append(s)
                else:
                    return t
        try:
            if ',' in s:
                sss = sss[sss.index(s)+len(s):]
            else:
                sss = sss[sss.index(s):]
        except:
            0
    return seg()
0

zzz = "test=[1,(2,[[3,4],{5,'6'},7],8),9],(xyz=({'A':('B','C')},['D','E'])),('ZZZ') ###"

print encl(zzz)
print encl(zzz,1)
print encl(zzz,'2,')
print encl(zzz,'xyz')

print
for z in encl(zzz,2):
    print z

'''
test=[1,(2,[[3,4],{5,'6'},7],8),9]
[1,(2,[[3,4],{5,'6'},7],8),9]
[[3,4],{5,'6'},7]
xyz=({'A':('B','C')},['D','E'])

[1,(2,[[3,4],{5,'6'},7],8),9]
(xyz=({'A':('B','C')},['D','E']))
('ZZZ')
'''