//Error after line 1
// RESULT : 0.265
S=? [ x!=y ]

//between the output of line1 and line 2
// RESULT : 0.2119125
S=? [ y!=z ]

// after l1 + l2 with single transmission error either in l1 or l2
// RESULT : 0.22131875
S=? [x!=z & x!=y]

//after l1+l2 with double transmission error in line1 and line 2
// RESULT : 0.04368125
S=? [x=z & x!=y]