function solution(survey, choices) {
let t = {R:0, T:0, C:0, F:0, J:0, M:0, N:0, A:0};
const s = [3,2,1,0,1,2,3];
choices.map((c,i) => {
let cha = c-1 < 3 ? survey[i][0] : survey[i][1];
t[cha] += s[c-1];
})
let answer = "";
if(t["R"] >= t["T"]) answer += "R"; else answer += "T";
if(t["C"] >= t["F"]) answer += "C"; else answer += "F";
if(t["J"] >= t["M"]) answer += "J"; else answer += "M";
if(t["A"] >= t["N"]) answer += "A"; else answer += "N";
return answer;
}