Question: Consider a push down automaton with 2 stacks. (Note that in a regular push down automaton, you only have one stack.) Do you think this

Consider a push down automaton with 2 stacks. (Note that in a regular push down automaton, you only have one stack.) Do you think this 2-stack push down automaton can recognize the string {w| w = a^nb^nc^n}, which cant be recognized by a regular 1-stack push down automaton? Is a 2-stack push down automaton as powerful as a Turing machine?

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