HARD to EASY

Everything in Life, we always starts learning it from the HARD way. After which we practice, practice & practice... Then it will soon become a EASY job for us. Likewise today, YOU should try and put in a little effort to solve the below puzzles, changing ONE alphabet at one time & form a new word in each move. Eventually changing the word "HARD" to "EASY" in 4 steps.

H A R D
_ _ _ _ C A R D

_ _ _ _ C A R T

_ _ _ _ C A S T

_ _ _ _ E A S T

E A S Y

How isit? Is it really that diffcult?