shot1 = {"e101", "e112", "e132", "e104", "e105", "e116", "e227", "e128", "e109"} shot2 = {"e112", "e132", "e105", "e116", "e227", "e109"} influenza = {"e101", "e132", "e104", "e126", "e227", "e148", "e109", "e345", "e156"} def excuteOption(x): st = set() if x == 1: for i in shot1: if i in shot2 and i in influenza: st.add(i) for j in shot2: if j in shot1 and j in influenza: st.add(j) for k in influenza: if k in shot1 and k in shot2: st.add(k) st = list(st) st.sort(reverse=True) elif x == 2: for i in shot1: if i not in shot2 and i not in influenza: st.add(i) for j in shot2: if j not in shot1 and j not in influenza: st.add(j) for k in influenza: if k not in shot1 and k not in shot2: st.add(k) st = list(st) st.sort() else: return 'Bye' return st x = int(input('Enter the option:')) print(excuteOption(x))