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# From Fabien Coelho

R := { [i, j, k, l, m, n, o, p] :
 0 <= i <= 3 && 
 0 <= j <= 3 &&
 0 <= k <= 3 &&
 0 <= l <= 3 &&
 0 <= m <= 3 &&
 0 <= n <= 3 &&
 1 <= o <= 1000 && o <= p <= 2 o +1 && 
 0 <= -1000 i + o + p <= 999 &&
 0 <= -1000 j - o + 2p <= 999 &&
 -1 <= -1000 k + 3 o <= 998 &&
 2 <= -1000 l + 2 o + p <= 1001 &&
 0 <= -1000 m + o <= 999 &&
 3 <= -1000 n + 2 p<= 1002
} ;

R;

R7 :=  { [i, j, k, l, m, n, o, p] 
		 -> [i, j, k, l, m, n, o ]}(R);
R7;
approximate R7;
R6 :=  { [i, j, k, l, m, n, o] 
		 -> [i, j, k, l, m, n ]}(R7);
R6;
approximate R6;
R5 :=  { [i, j, k, l, m, n] 
		 -> [i, j, k, l, m ]}(R6);
R5;
approximate R5;
R4 :=  { [i, j, k, l, m] 
		 -> [i, j, k, l ]}(R5);
R4;
approximate R4;
R3 :=  { [i, j, k, l] 
		 -> [i, j, k ]}(R4);
R3;
approximate R3;
R2 :=  { [i, j, k] 
		 -> [i, j ]}(R3);
R2;
approximate R2;
R1 :=  { [i, j] 
		 -> [i]}(R2);
R1;
approximate R1;