''' print(ord('a'),ord('b'),ord('A'),ord('B')) print(chr(97),chr(98),chr(65),chr(66)) print('A'.lower()) mapping={0:0,1:1,'abc':2,'def':3,'ghi':4,'jkl':5,'mno':6,'pqrs':7,'tuv':8,'wxyz':9} print(mapping.items()) print(mapping.keys(),mapping.values()) print('s' in list(mapping.keys())[9]) ''' pw=str...