S,T,c = input().split()  #3個の文字列の入力を受け取る

YoN = "No"

if c == "<" :
    if  S < T:
     YoN = "Yes"

elif c == ">" :
    if S > T:
        YoN = "Yes"

elif c == "=" :
    if S == T:
        YoN = "Yes"

print(YoN)