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图省事用的vector，测试数据没问题

#include <iostream>
#include <vector>
#include <string>

using namespace std;

vector<string> words;

int main(){
    string tmp;
    while(cin>>tmp && cin.get() != '\n'){
        words.push_back(tmp);
    }
    words.push_back(tmp);
    for(int i = 0;i < words.size();i++){
        if(i != words.size()-1)cout<<words[i].size()<<',';
        else cout<<words[i].size();
    }
}