{
s == 0: "A",
0 < s < 2: "B",
2 <= s < 5: "C",
5 <= s < 20: "D",
20 <= s < 50: "E",
50 <= s < 100: "F",
100 <= s < 200: "G",
200 <= s < 300: "H",
300 <= s < 500: "I",
500 <= s < 800: "J",
800 <= s < 1000: "K",
1000 <= s < 1500: "L",
1500 <= s < 2000: "M",
2000 <= s < 3000: "N",
3000 <= s < 5000: "O",
5000 <= s < 10000: "P",
10000 <= s < 20000: "Q",
20000 <= s < 30000: "R",
30000 <= s < 50000: "S",
s >= 50000: "T"
}