Evaluate Higher Order Homogenous Differential Equation $ (D^4 - D^3)y=0; y(0) = 1 = y'(0), y''(1) = 3e, y'''(1) = e $

Question

I'm getting following values of constants:

$C1 = 0$

$ C2 = 0$

$C3 = e$

$ C4 = 1$

But in my solution manual of the book, the constant values are coming like this:

$C1 = 0$

$ C2 = 0$

$C3 = 1$

$ C4 = 1$

I wanted to know if I am doing it wrong or there's some printing mistake in the solution manual of the book I have got?

Update:

Here's my procedure:

$D^3(D-1) = 0$

$D=0,0,0,1$

$y = c_1 + c_2x+c_3x^2+c_4e^x$

$y' = c_2+2c_3x+c_4e^x$

$y'' = 2c_3+c_4e^x$

$y''' = c_4e^x$