diff --git a/src/data/codingcontracttypes.ts b/src/data/codingcontracttypes.ts
index 68322a80f..6ee30e76d 100644
--- a/src/data/codingcontracttypes.ts
+++ b/src/data/codingcontracttypes.ts
@@ -1260,7 +1260,8 @@ export const codingContractTypesMetadata: ICodingContractTypeMetadata[] = [
         "Convert it to a binary representation and encode it as an 'extended Hamming code'. Eg:\n ",
         "Value 8 is expressed in binary as '1000', which will be encoded",
         "with the pattern 'pppdpddd', where p is a parity bit and d a data bit,\n",
-        "or '10101' (Value 21) will result into (pppdpdddpd) '1001101011'.\n\n",
+        "or '10101' (Value 21) will result into (pppdpdddpd) '1001101011'.\n",
+	"The answer should be given as a string containing only 1s and 0s.\n",
 	"NOTE: the endianness of the data bits is reversed in relation to the endianness of the parity bits.\n",
         "NOTE: The bit at index zero is the overall parity bit, this should be set last.\n",
         "NOTE 2: You should watch the Hamming Code video from 3Blue1Brown, which explains the 'rule' of encoding,",