User inputs one row of knitting instructions, program outputs number of stitches.

Values
1 st     di=+2                3 sts
0 st     m1=+1                1 st
0 st     m1l=+1               1 st
0 st     m1r=+1               1 st
0 st     o=+1                 1 st
0 st     yo=+1                1 st
0 st     yo twice=+2          2 sts
0 st     (yo)2=+2             2 sts

2 sts    P2t=-1               1 st
2 sts    P2tog=-1             1 st
1 st     psso=-1              0 st
2 sts    skp= -1              1 st
2 sts    skpo= -1             1 st
2 sts    k2t=-1               1 st
2 sts    k2tog=-1             1 st
2 sts    ssk=-1               1 st
2 sts    ssp=-1               1 st
3 sts    sssk=-2              1 st
3 sts    dd=-2                1sts ( this can also be expressed as sl1k2togpsso)
3 sts    sl(1)k2togpsso= -2   1 st 
4 sts    sl(1)k3togpsso= -3   1 st

x st     K(x)=x               x st
x st     P(x)=x               x st
x st     sl(x)=x              x st
x st     sl(x)k=x             x st
x st     sl(x)wyif=x          x st
2 sts    sl1k1psso=           1 st

2 sts    ssw=0                2 sts
1 st     syif=0               1 st

