diff --git a/BirthdayWithC.c b/BirthdayWithC.c
new file mode 100644
index 0000000..1d23533
--- /dev/null
+++ b/BirthdayWithC.c
@@ -0,0 +1,9 @@
+#include <stdio.h>
+char *secret = "ziBbeqjAs+cu";
+unsigned long message = 10521325414783145265U;
+int main(void) {
+    while (message) {
+        putchar(secret[message & 15] - 33);
+        message >>= 4;
+    }
+}