Let the alphabet A = { a, b, c, d, e, f, g, h, I, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z, } and the key

K = this is a key

(The last letter of the alphabet is a blank, and there is a single blank separating words in the key)

a. What is the Vigenere ciphertext for the message: this is the next assignment

b. Suppose we started numbering the letters at 1 instead of 0, so a is 1, b is 2, c is 3, etc. Would that have any implication or impact on the cipher (other than moving them all down one)? Yes or no, and if yes, what?