diff --git a/src/desc_parser.rs b/src/desc_parser.rs
index b4172b0..0b50520 100644
--- a/src/desc_parser.rs
+++ b/src/desc_parser.rs
@@ -22,7 +22,8 @@ fn get_filtered_chars(s: &str) -> Vec<char> {
 }
 
 fn find_first_russian(chars: &Vec<char>) -> Option<usize> {
-    let russian_chars: HashSet<char> = ('а'..='я').collect();
+    let russian_chars: HashSet<char> =
+        ('а'..='я').chain(std::iter::once('ё')).collect();
     chars.iter().enumerate()
         .find(|(_, c)| russian_chars.contains(&c.to_lowercase().next().unwrap()))
         .map(|(i, _)| i)
@@ -59,6 +60,11 @@ mod test_first_russian {
     fn mixed_case() {
         assert_eq!(find_first_russian(&to_char_array("Test ПРИВЕТ привет")), Some(5));
     }
+
+    #[test]
+    fn starts_with_io() {
+        assert_eq!(find_first_russian(&to_char_array("ёлка")), Some(0));
+    }
 }
 
 #[cfg(test)]