From the $2018/2019$ CS$402$ exam paper:$)$ The ciphertext string

ASISENGEHFGNONFVWTGNQWCVSE

was produced using a shift cipher over the $27-$letter alphabet

A $=0,$ B $=1,...,$ Z $=25,=26,$

where the final character indicates a space.

By conducting a frequency analysis of a larger sample of ciphertexts, it has been

found that the plaintext symbol E corresponds to the ciphertext symbol S$.$ Determine

the first word of the plaintext string corresponding to the ciphertext string given

above.