diff --git a/CPP programs/A Serial Killer.cpp b/CPP programs/A Serial Killer.cpp
new file mode 100644
index 0000000..db9e3ec
--- /dev/null
+++ b/CPP programs/A Serial Killer.cpp	
@@ -0,0 +1,21 @@
+#include<bits/stdc++.h>
+using namespace std;
+
+int main(){
+	long long int n, i;
+	string s, s1, a, a1;
+	cin>>s>>s1;
+	cin>>n;
+	cout<<s<<" "<<s1<<endl;
+	for(i=0; i<n; i++){
+		cin>>a>>a1;
+		if(a == s){
+			s =a1;
+		}
+		else{
+			s1 = a1;
+		}
+		cout<<s<<" "<<s1<<endl;
+	}
+	return 0;
+}