Submission #3599327

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Source Code Expand

S=str(input())
for i in range(20000):
    if S[-7:]=="dreamer":
        S=S[:-7]
    if S[-6:]=="eraser":
        S=S[:-6]
    if S[-5:]=="dream" or S[-5:]=="erase":
        S=S[:-5]
    if S[-7:]!="dreamer" and S[-6:]!="eraser" and S[-5:]!="dream" and S[-5:]!="erase":
        break
if len(S)==0:
    print("YES")
else:
    print("NO")

Submission Info

Judge Result