Of these US Coins (Quarter and Dime Combo).
Initial arrangement of the coins as shown in the picture is as follows... Q D Q D Q D Q
Objective is to attain the final configuration... Q Q Q Q D D D.
You are allowed to move a pair of coins (QD or DQ) as a unit .
You have to place them in the same configuration(DQ or QD) between any coin, front or at the end of the row.
You have to repeat the process till final desired configuration is reached.
Document the intermediate steps and any particular strategy employed.