content

let letters = ["0", "a", "b", "c", "d", "e", "f", "g", "h"]
let numbers = ["0", "1","2","3","4","5","6","7","8"]

func position(column: Int, row: Int) -> String {
    if (column < letters.startIndex || column > letters.count) {
        return "The board accepts onlynumbers from 1 to 8"
    }else if (row < numbers.startIndex || row > numbers.count){
        return "The board accepts onlynumbers from 1 to 8"
    }
    var pieceAtColumn = letters[column]
    var pieceAtRow = numbers[row]
    let piecePosition = pieceAtColumn + pieceAtRow
    
    return piecePosition

}