D twin

D twinD twinD twinD twinD twinD twin
D twinD twinD twinD twinD twinD twin
D twinD twinD twinD twinD twinD twinD twinD twinD twinD twinD twinD twinD twinD twinD twinD twinD twinD twinD twinD twinD twinD twinD twinD twinD twinD twinD twinD twinD twinD twin