func StrToInt(str string) int { number := 0 for i := 0; i < len(str); i++ { number = 10*number + int(str[i]-'0') } return number }
func StrNumberOffsetAfter(num int, number int, r int) int { return r*number + num }
func StrNumberOffsetBefore(num int, number int, ) int { return number - int(math.Pow10(len(string(number))-1)) }