A construction firm has decided to use burnt clay bricks of class 20 and above (as per IS 1077: 1992) for the construction of a residential complex. The table below gives the details of Samples with IDs (S1, S2, S3, S4, and S5) taken from five different suppliers. The criteria to be adopted are the percentage of water absorption and average compressive strength of bricks corresponding to bricks of class 20 and above. Select the Id of the samples which can be recommended for use in brick wall construction.

Id Water Absorption (%) Average compressive strength (kN/m2)
S1 18 17500
S2 20 21000
S3 12 20000
S4 10 14000
S5 15 27000