diff --git a/read.c b/read.c
index a975d12..e56ee30 100644
--- a/read.c
+++ b/read.c
@@ -140,8 +140,7 @@ token *lex1Token(char *input, int *i)
 	regcomp(&regSpace, "^[[:space:]]*", REG_EXTENDED);
 
 	regcomp(&regNumber, "^[-+]?[[:digit:]]+", REG_EXTENDED);
-	regcomp(&regSymbol, "^[-+/*]+", REG_EXTENDED);
-/* за сада подржава само симболе -, +, * и / */
+	regcomp(&regSymbol, "^[-+/*[:alpha:]][-+/*[:alnum:]]*", REG_EXTENDED);
 	regcomp(&regLParenthesis, "^\\(", REG_EXTENDED);
 	regcomp(&regRParenthesis, "^\\)", REG_EXTENDED);