Práctica de modelo de tres capas

1 1 234567849A91BAC4D3AE19611 F76819616767D1 363467A1631DAC431 1 1 1 1 1 843A7A11 F6D7A1961486A81 1 1 1 1 1 67C4C4D81961 D96ED1961!1AA81 1 1 "D1#$%!11 1 1 1 &4C 1(454A3A1)3C*6+1 1

1 1 234567849A91BAC4D3AE19611 F76819616767D1 363467A1631DAC431 1 1 1 1 1 843A7A11 F6D7A1961486A81 1 1 1 1 1 67C4C4D81961 D96ED1961!1AA81 1 1 "D1#$%!11 1 1 1 &4C 1(454A3A1)3C*6+1 1 Less