package tournament

import (
    "errors"
    "strings"
	"io"
) 
func Tally(in io.Reader, out io.Writer) error {
    buf := new(strings.Builder)
    _, err := io.Copy(buf, in)
    if err != nil {
        return err
    }
    s := buf.String()
    lines := strings.Split(s, "\n")

    for _, line := range lines {
        if strings.HasPrefix(line, "#") || len(line) == 0 {
            continue
        }
    }
    return errors.New("foo")
}