每筆測試資料一列。每列有2個西洋棋的座標位置。每個位置座標是由一個英文字母（a-h，代表棋盤的第幾欄）及一個數字（1-8，代表棋盤的第幾列）組成。

對每一列輸入，請輸出 "To get from xx to yy takes n knight moves.".

To get from e2 to e4 takes 2 knight moves.
To get from a1 to b2 takes 4 knight moves.
To get from b2 to c3 takes 2 knight moves.
To get from a1 to h8 takes 6 knight moves.
To get from a1 to h7 takes 5 knight moves.
To get from h8 to a1 takes 6 knight moves.
To get from b1 to c3 takes 1 knight moves.
To get from f6 to f6 takes 0 knight moves.