@IBAction func submitTapped(_ sender: Any) {

//array.count is bigger than the number of appearing cells on the screen.

    for i in 0..<array.count {
        let index = IndexPath(row: i, section: 0)
        let cell = self.table.cellForRow(at: index) as! CustomTableViewCell
        for a in 0...6 {
            print(i)
            print(a)
            if let letter = cell.letter.text {
                print(letter)
            }
        }
    }
}