这对的其他字母例如,sh变成pb,ea变成im。Examples: (solve it) 1. key=“summer” then write Playfair matrix(table) 2. key=“computer” then write Playfair matrix(table) 3. key=“colgate” then write Playfair matrix(table) 4. key=“hello” and plaintext=”university” then write Playfair matrix (table) and Encrypt