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First solution in Clear category for Right to Left by Bartek.Knobel
def left_join(phrases):
b = len(phrases)
c = ""
for i in range(b-1):
a = phrases[i]
a = a.replace("right", "left")
c = c + a + ","
d = phrases[b-1]
d = d.replace("right", "left")
c = c + d
return c
if __name__ == '__main__':
#These "asserts" using only for self-checking and not necessary for auto-testing
assert left_join(("left", "right", "left", "stop")) == "left,left,left,stop", "All to left"
assert left_join(("bright aright", "ok")) == "bleft aleft,ok", "Bright Left"
assert left_join(("brightness wright",)) == "bleftness wleft", "One phrase"
assert left_join(("enough", "jokes")) == "enough,jokes", "Nothing to replace"
Oct. 22, 2016