DOMINO EFFECT

Using an ordinary 28-tile double-six set of dominoes, place tiles in a continuous chain so that the total number of spots in each row and column adds up to the totals provided. The domino halves at the beginning and end of the chain are completed for you already. Dominoes should be placed end to end along the path, matching the adjacent ends. Remember, domino sets include blanks and there is only one tile with any given combination of numbers.