diff --git a/UNKNOWN/createImages b/UNKNOWN/createImages
index ca0956781385f09e78735a90eca47174b027db93..a58361c8e54b9e0e94cd6709d2f66882f48a94c0 100755
--- a/UNKNOWN/createImages
+++ b/UNKNOWN/createImages
@@ -56,14 +56,23 @@ dotPos[3]=${digitPos[3]}
 dotPos[2]=${digitPos[2]}
 dotPos[1]=${digitPos[1]}
 
+NUM2CHAR[0]='0'
+NUM2CHAR[1]='1'
+NUM2CHAR[2]='2'
+NUM2CHAR[3]='3'
+NUM2CHAR[4]='4'
+NUM2CHAR[5]='5'
+NUM2CHAR[6]='6'
+NUM2CHAR[7]='7'
+NUM2CHAR[8]='8'
+NUM2CHAR[9]='9'
+NUM2CHAR[10]='E'
+
 for ((FNb=1; FNb<=MAX_FILES; FNb++)); do
 
 DPR=$((RANDOM % $NUMBER_OF_DIGITS + 1)) # random dot position (1..$NUMBER_OF_DIGITS)
 for (( i=1; i<=$MAX_DIGITS; i++ )); do 
-  DNR[$i]=$((RANDOM % 10 + 1)) # random digit number (0..10)
-  if [ ${DNR[i]} == 10 ]; then
-    DNR[$i]="E"
-  fi
+  DNR[$i]=${NUM2CHAR[$((RANDOM % 10 + 1))]} # random digit number (0..10)
   if [ $DPR == $i ]; then
     dotFile[$i]="$dotFile"
     DOT[$i]="." # dot character