A and b together can complete a piece of work in 8 days. B and c together can complete the same work in 12 days. C and a together can complete the same work in 16 days. A and b began the work together and left after some days. C finished the remaining work. If it took a total of 74 days to complete the entire work, for how many days did a and b work together?
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a and b went on a walk and c is dead
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