diff --git a/level00/ressources/rotX.c b/level00/ressources/rotX.c
new file mode 100644
index 0000000..c27b521
--- /dev/null
+++ b/level00/ressources/rotX.c
@@ -0,0 +1,20 @@
+#include <stdio.h>
+
+char rotate_char(char c, int rot) {
+	return (c - 'a' + rot) % 26 + 'a';
+}
+
+void rotate_string(const char *input, int rot) {
+    printf("rot%d:\t", rot);
+    for (int i = 0; input[i] != '\0'; i++) {
+        printf("%c", rotate_char(input[i], rot));
+    }
+    printf("\n");
+}
+
+int main() {
+    char input[] = "cdiiddwpgswtgt";
+    for (int rot = 1; rot <= 25; rot++) {
+        rotate_string(input, rot);
+    }
+}