#include<bits/stdc++.h> using namespace std; int main(){ string s; int cnt1=0,cnt2=0; cin>>s; for(int i=0;i<=s.size()-1;i++){ if(s[i]'>'){ cnt1++; }else if(s[i]'<'){ cnt2++; } }

if(cnt1==1 and cnt2==1){
	cout<<"Yes";
}else{
	cout<<"No";
}
return 0;

}