#include<iostream>
#include<cstring>
#include<cstdio>

using namespace std;

bool DFA(string s){//识别无符号数 
    int len = s.length();//串长 
    // 判断最后一位是否合法
    if(s[len - 1] < '0' || s[len - 1] > '9') return false; 
    if(s[len -1] == 'e' || s[len- 1] == 'E') return false;  
    if(s[len- 1] == '.' || s[len - 1] == '+' || s[len - 1] == '-') return false;

    int i = 0;
    if(s[0] < '0' || s[0] > '9') return false;//判断首位是否为数字
    for(; i < len; i ++){
        if(s[i] <= '9' && s[i] >= '0'){
            i ++;
        }
        else if(s[i] == '.'){//当前位为'.' 
            char c = s[i + 1];
            if(c >= '0' || c <= '9') i ++;
            else return false;
        }
        else if(s[i] == 'E' || s[i] == 'e'){//当前位为'E'或'e' 
            char c = s[i + 1];//预判下一位 
            if(c >= '0' || c <= '9') i ++;
            else if (c == '+' || c == '-') i ++;
            else return false;

        }
        else if(s[i] =='+' || s[i] == '-') i ++;//当前位为'+'或'-' 
        else return false;
    }
    if(i == len) return true;
}

int main(){
    cout << "input '*' to stop ! " << endl; 
    while(1){
        string str;
        cin >> str;
        if(str == "*") return 0;

        if(DFA(str)) cout << "YES" << endl;
        else cout << "NO" << endl;
    }

    return 0;
}