Nested IFs:Greater, Same, or Less.

Hey all, im new to these Excel forums and everyone looks pretty cool here, but i have a question. I have been stuck on this question for a couple days, i would like to solve it on my own, but its driving me insane and i just want an answer. This is the question.
Use a function to compute the totals in row 7. In a row 8, compare that month's total expenses with the prior month's and display the word Greater, Same, or Less. Since february's total expense is less than January's, display Less in C8. Since January is the first month, there is no comparison with a prior month. Use nested IF fucntion. And this is what the final outcome should look like. \1
You are thinking , you have the answer-- right? I need to enter the right formula for it too pass through the grading system on the computer.

I have tried this formula to no avail.

=IF(B7>C7,"Less",IF(C7>D7,"Greater",IF(D7>E7,"Same")))