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Second solution in Clear category for Right to Left by PiotrStachowiak
def left_join(phrases):
a=0
wynik=[]
for i in phrases:
i=i.replace("right","left")
wynik.append(i)
wynik.append(",")
wynik=wynik[:-1]
wynik="".join(wynik)
return wynik
Oct. 20, 2016