442 0x700
Seed = IV concatenated with the key
K[]=41591XXXX 41591 XXXX
S[]=0123456789101112131415
KSA step one:
i =0
j= j+S[i]+K[i]
j=0+0+4=4
Swap S[i] and S[j]
K[]=41591XXXX 41591 XXXX
S[] = 4 1230 56789101112131415
KSA step two:
i =1
j= j+S[i]+K[i]
j=4+1+15=4
Swap S[i] and S[j]
K[]=41591XXXX 41591 XXXX
S[] = 4 0231 5 6 7 8 9 10 11 12 13 14 15
KSA step three:
i =2
j= j+S[i]+K[i]
j=4+2+9=15
Swap S[ i] and S[j]
K[]=41591XXXX 41591 XXXX
S[]=40 15 315678910111213142
KSA step four:
i =3
j= j+S[i]+K[i]
j=15+3+1=3
Swap S[i] and S[j]
K[]=41591XXXX 41591 XXXX
S[]=40 15 315678910111213142
output − j− S[4] = key[1]
6 − 3 − 1=2