Please, how do I do this manually? The following ciphertext was the output of a shift cipher:

lcllewljazlnnzmvyiylhrmhza

By performing a frequency count, guess the key used in the cipher. Use the computer to test your hypothesis. What is the decrypted plaintext? $($The ciphertext is stored in the downloadable computer files $($bit$.$ ly$/2$JbcS$6$p$)$ under the name lcll$.)$