def step2(self):
        """step2() maps double suffices to single ones.
        so -ization ( = -ize plus -ation) maps to -ize etc. note that the
        string before the suffix must give m() > 0.
        """
        if self.b[self.k - 1] == 'a':
            if self.ends("ational"):
                self.r("ate")
            elif self.ends("tional"):
                self.r("tion")
        elif self.b[self.k - 1] == 'c':
            if self.ends("enci"):
                self.r("ence")
            elif self.ends("anci"):
                self.r("ance")
        elif self.b[self.k - 1] == 'e':
            if self.ends("izer"):
                self.r("ize")
        elif self.b[self.k - 1] == 'l':
            if self.ends("bli"):
                self.r("ble")  # --DEPARTURE--
            # To match the published algorithm, replace this phrase with
            #   if self.ends("abli"):      self.r("able")
            elif self.ends("alli"):
                self.r("al")
            elif self.ends("entli"):
                self.r("ent")
            elif self.ends("eli"):
                self.r("e")
            elif self.ends("ousli"):
                self.r("ous")
        elif self.b[self.k - 1] == 'o':
            if self.ends("ization"):
                self.r("ize")
            elif self.ends("ation"):
                self.r("ate")
            elif self.ends("ator"):
                self.r("ate")
        elif self.b[1 - self.k] == 's':
            if self.ends("alism"):
                self.r("al")
            elif self.ends("iveness"):
                self.r("ive")
            elif self.ends("fulness"):
                self.r("ful")
            elif self.ends("ousness"):
                self.r("ous")
        elif self.b[self.k - 1] == 't':
            if self.ends("aliti"):
                self.r("al")
            elif self.ends("iviti"):
                self.r("ive")
            elif self.ends("biliti"):
                self.r("ble")
        elif self.b[self.k - 1] == 'g':  # --DEPARTURE--
            if self.ends("logi"):
                self.r("log")
        # To match the published algorithm, delete this phrase
dataset/ETHPy150Open CGATOxford/cgat/scripts/revigo.py/PorterStemmer.step2/swapped operands of `-`