diff --git a/zeta_C/completed/7785.c b/zeta_C/completed/7785.c
new file mode 100644
index 0000000..7daca74
--- /dev/null
+++ b/zeta_C/completed/7785.c
@@ -0,0 +1,40 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+typedef struct _Item {
+    char name[6];
+    char isin;
+} Item;
+
+int comp(const void *a, const void *b) {
+    int cmp = strcmp((*(Item *) a).name, (*(Item *) b).name);
+
+    return -cmp;
+}
+
+int main() {
+    int N;
+
+    scanf("%d", &N);
+    Item res[N + 1];
+    for (int i = 0; i < N; i++) {
+        char temp[6];
+        scanf("%s %s", res[i].name, temp);
+        if (temp[0] == 'e') {
+            res[i].isin = 1;
+        } else {
+            res[i].isin = 0;
+        }
+    }
+
+    qsort(res, N, sizeof(Item), comp);
+    for (int i = 0; i < N; i++) {
+        if (comp(&res[i], &res[i + 1]) == 0) {
+            i++;
+        } else {
+            printf("%s\n", res[i].name);
+        }
+    }
+    return 0;
+}
\ No newline at end of file
diff --git a/zeta_python/completed/7785.py b/zeta_python/completed/7785.py
new file mode 100644
index 0000000..61c33d5
--- /dev/null
+++ b/zeta_python/completed/7785.py
@@ -0,0 +1,17 @@
+import sys
+
+input = sys.stdin.readline
+print = sys.stdout.write
+
+N = int(input())
+d = dict()
+for _ in range(N):
+    n, t = input().rstrip().split()
+    if t.startswith("e"):
+        d[n] = 1
+    else:
+        d[n] = 0
+x = sorted([k for k, v in d.items() if v == 1])[::-1]
+for i in x:
+    print(i)
+    print('\n')