Ticket Combination

package main

import "fmt"

func main() {
    var n int
    fmt.Scanln(&n)

    for a := int('B'); a <= int('L'); a += 2 {
        for b := int('f'); b >= int('a'); b-- {
            for c := int('A'); c <= int('C'); c++ {
                for d := 1; d <= 10; d++ {
                    for e := 10; e > 0; e-- {
                        n--
                        if n == 0 {
                            fmt.Printf("Ticket combination: %c%c%c%d%d\n", a, b, c, d, e)
                            fmt.Printf("Prize: %d lv.", a + b + c + d + e)
                            return
                        }
                    }
                }
            }
        }
    }
}