ьфклук

[Rabby]

def mark(a, x):
'''
>>> mark("aa bbb ccc dd", 'bbb')
'aa {bbb} ccc dd'
'''
b = a.split()
c = list (enumerate (b))
res = ""
for i,e in c:
if e == x:
f = '{' + x + '}'
e = f
res += e
if ((i+1) < len(c)):
res += ' '
return res

if __name__ == '__main__':
import doctest
doctest.testmod()