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  _  __   __   __   ______    _    _      _____  
 | |/ //  \ \\/ // |      \\ | || | ||   / ___// 
 | ' //    \ ` //  |  --  // | || | ||   \___ \\ 
 | . \\     | ||   |  --  \\ | \\_/ ||   /    // 
 |_|\_\\    |_||   |______//  \____//   /____//  
 `-` --`    `-`'   `------`    `---`   `-----`

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Text this: The graph relabeling problem and its variants