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