The distribution of plaintexts is
P(1) = 0.15, P(2) = 0.10, P(3) = 0.15, P(4) = 0.15, P(5) = 0.35, P(6) = 0.10
The distribution of keys is
P(1) = 0.25, P(2) = 0.10, P(3) = 0.05, P(4) = 0.20, P(5) = 0.25, P(6) = 0.15
Encryption with the key 1 maps the plaintexts {1,2,3,4,5,6} to ciphertexts {3,6,5,1,2,4}
Encryption with the key 2 maps the plaintexts {1,2,3,4,5,6} to ciphertexts {5,3,6,1,4,2}
Encryption with the key 3 maps the plaintexts {1,2,3,4,5,6} to ciphertexts {5,4,6,3,2,1}
Encryption with the key 4 maps the plaintexts {1,2,3,4,5,6} to ciphertexts {5,6,1,2,4,3}
Encryption with the key 5 maps the plaintexts {1,2,3,4,5,6} to ciphertexts {1,5,4,6,2,3}
Encryption with the key 6 maps the plaintexts {1,2,3,4,5,6} to ciphertexts {6,1,5,4,2,3}