In python create a code that will decrypt a Caesar encrypted message without a decryption key.

This is what I have. I need it to only include letters in the decryption process. It is including symbols and numbers. That is what I DO NOT need to happen.

def caesar_decrypt():

word = input('Enter the cipher text: ')

c = ''

for i in word:

if (i == ' '):

c += ' '

else:

c += (chr(ord(i) - 10))

return c

decipher = caesar_decrypt()

print("Decrypted text :",decipher)

Example:

Enter the cipher text: UXENRBWXCUXENFQRLQJUCNABFQNWRCJUCNAJCRXWORWMB Decrypted text : KN;DH8MN9KN;D