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  _  _      ___               _    _    _    _   
 | \| ||   / _ \\    ____    | || | || | \  / || 
 |  ' ||  | / \ ||  |    \\  | || | || |  \/  || 
 | .  ||  | \_/ ||  | [] ||  | \\_/ || | .  . || 
 |_|\_||   \___//   |  __//   \____//  |_|\/|_|| 
 `-` -`    `---`    |_|`-`     `---`   `-`  `-`  
                    `-`

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Text this: An extension of the Christofides heuristic for the generalized multiple depot multiple traveling salesmen problem