def wrap(string, max_width):
    new_str = ''
    ind_width = []
    for i in range(len(string)):
        if (i+1)%max_width == 0:
            new_str = new_str + string[i-(max_width-1):i+1]+'\n'
            ind_width.append(i+1)
    new_str = new_str+string[max(ind_width):]
    return new_str