- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{    [tableView beginUpdates];
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        [self.alphabets removeObjectAtIndex:indexPath.row];
        [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObjects:indexPath, nil] withRowAnimation:UITableViewRowAnimationFade];
    }
    if (editingStyle == UITableViewCellEditingStyleInsert) {

        [self.alphabets insertObject:[self.alphabets objectAtIndex:indexPath.row] atIndex:[self.alphabets count]-1];

        NSIndexPath * path1 = [NSIndexPath indexPathForRow:indexPath.row inSection:0];

        NSArray * index = [NSArray arrayWithObjects:path1, nil];

        [self.tableView insertRowsAtIndexPaths:index withRowAnimation:UITableViewRowAnimationAutomatic];
    }
    [tableView endUpdates];
    NSLog(@"%@",self.alphabets);
}

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
    {
        [tableView beginUpdates];
        if (editingStyle == UITableViewCellEditingStyleInsert) {

                [self.alphabets insertObject:[self.alphabets objectAtIndex:indexPath.row] atIndex:[     self.alphabets count]-1];

                NSIndexPath * path1 = [NSIndexPath indexPathForRow:indexPath.row inSection:0];
                NSIndexPath * path2 = [NSIndexPath indexPathForRow:indexPath.row+1 inSection:0];

                NSArray * index = [NSArray arrayWithObjects:path1,path2, nil];

                [self.tableView insertRowsAtIndexPaths:index                withRowAnimation:UITableViewRowAnimationAutomatic];
                }
                [tableView endUpdates];
                NSLog(@"%@",self.alphabets);
    }

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (editingStyle == UITableViewCellEditingStyleInsert) {

    UIAlertController * alert = [UIAlertController alertControllerWithTitle:@"Inserting a new row" message:@"Enter text below to add it to table view" preferredStyle:UIAlertControllerStyleAlert];

    [alert addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
    }];

    UIAlertAction * ok = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        NSArray * tfArray = alert.textFields;
        UITextField * tf = [tfArray objectAtIndex:0];
        self.userInput = tf.text;
        NSLog(@"%@",self.userInput);
        [self.alphabets insertObject:self.userInput atIndex:indexPath.row];
        [tableView reloadData];
    }];

    [alert addAction:ok];
    [self presentViewController:alert animated:NO completion:nil];
    }

    NSLog(@"%@",self.alphabets);
}