NAME          l3 ( from chvatal's book page 135, Problem e. )
ROWS
 N  Z
 E  R1
 E  R2
 E  R3
 E  R4
COLUMNS
    X1        Z   1  R1  3 R2 4  R3   2  R4  1 
    X2        Z   0  R1  5 R2 6  R3   4  R4  1 
    X3        Z   0  R1  3 R2 5  R3   1  R4  2 
    X4        Z   0  R1  2 R2 3  R3   1  R4  1 
    X5        Z   0  R1  1 R2 5  R3  -3  R4  4 
    X6        Z   0  R1  2 R2 5  R3  -1  R4  3 
    X7        Z   0  R1  1 R2 6  R3  -4  R4  5 
RHS
    RHS1      R1                6
    RHS1      R2                11
    RHS1      R3                1
    RHS1      R4                5
BOUNDS
ENDATA
