stile 1:    abcdefghijklmnopqrstuvwxyz1234567890
stile 2:    abcdefghijklmnopqrstuvwxyz1234567890
stile 3:    abcdefghijklmnopqrstuvwxyz1234567890
stile 4:    abcdefghijklmnopqrstuvwxyz1234567890
stile 5:    abcdefghijklmnopqrstuvwxyz1234567890
stile 6:    abcdefghijklmnopqrstuvwxyz1234567890