import  re 
''' 
testString = "0.0022271714922048997772828507795100222717149220489977728285077951002227171492204899777282850779510022" 
print(re.search(r"(\d \/ ?\d )(\d +?)(?=\1 )", testString).group(0))  
''' 
 
a =  [ "0.0022271714922048997772828507795100222717149220489977728285077951002227171492204899777282850779510022" , "0.714285714285714285714285714285714285714285" , "0.111111111111111111111111111111111111111111" , "0.166666666666666666666666666666666666666666" ] 
for  i in  a:
	print ( re .search ( r"(\d \d )(\d +?)(?=\1 )" ,  i) .group ( 0 ) ) 
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