diff --git a/services/ir/.ir.env b/services/ir/.ir.env
index 9e5d410..a767be6 100644
--- a/services/ir/.ir.env
+++ b/services/ir/.ir.env
@@ -21,6 +21,9 @@ NEOFS_IR_CONTRACTS_CONTAINER=1aa07a159e598b7ae32cc2b943411f22959a6ccf
 NEOFS_IR_CONTRACTS_NEOFS=005a4906ec233a3b677dad9fd7033ad8653f579d
 NEOFS_IR_CONTRACTS_AUDIT=a08892a059c3ddadd3498f0336e01388df03af7e
 
+# Amount of alphabetic contracts in network, 7 by default.
+# Limited by the number of letters in Glagolitic.
+#NEOFS_IR_CONTRACTS_ALPHABET_AMOUNT=3
 NEOFS_IR_CONTRACTS_ALPHABET_AZ=c22ec393723c72aaaec1ce4c1a83a8480de09092
 NEOFS_IR_CONTRACTS_ALPHABET_BUKY=c7a46472340642207268e38dcf7ff3873debc34b
 NEOFS_IR_CONTRACTS_ALPHABET_VEDI=8c06231687aad096a9192b7992ae0c434f1d6b3b