EXP-9(c).py

def convertOpposite(str):
  ln = len(str)
  for i in range(ln):
    if str[i] >= 'a' and str[i] <= 'z':
      str[i] = chr(ord(str[i]) - 32)
    elif str[i] >= 'A' and str[i] <= 'Z':
      str[i] = chr(ord(str[i]) + 32)

str = input("Enter the String:")
str = list(str)
convertOpposite(str)
str = ''.join(str)
print(str)