19
X^0:  20 
X^1:  
X^2:  
X^3:  19 
X^4:  16 
X^5:  
X^6:  
X^7:  
X^8:  
X^9:  
X^10:  
X^11:  19 
X^12:  16 
X^13:  
X^14:  
X^15:  15 
X^16:  4 12 
X^17:  17 
X^18:  
X^19:  3 11 19 
X^20:  0 
checksum: 190