Generated subgroup/77,91,143/Representation of 1/Bucket/Exercise

The delivery company "bucket without bugs“ is specialized in the transport of water. It has three buckets, one with ${}77$ liter, one with ${}91$ liter, and one with ${}143$ liter. The buckets do not have any marking. The company gets the request to transport, altogether, exactly one liter of water from the North Sea to the Baltic Sea. How can the company achieve this request?