The states are $$ q_0, q_1, q_2, q_3, q_4, q_5, q_6, q_7 $$.
$$ q_0 $$ is the initial state.
$$ q_3 $$ and $$ q_6 $$ are final states.
Transitions:
$$ q_0 \xrightarrow{a} q_1 $$
$$ q_0 \xrightarrow{b} q_4 $$
$$ q_1 \xrightarrow{a} q_3 $$
$$ q_1 \xrightarrow{b}
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