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import Foundation
struct Entity {
// Write your code here
}
// 以下的内容将能够判断名为 ID 的字符串是否满足13位数字的情况，可以直接照搬
// let reFormula = try! NSRegularExpression(pattern: "^\\d{13}$", options: [NSRegularExpression.Options.anchorsMatchLines])
// let matchRange = NSRange(ID.startIndex..<ID.endIndex, in: ID)
// let matchList = reFormula.matches(in: ID, range: matchRange)
// if matchList.count != 1 {
// return false
// }
// return true
