diff --git a/CF1554D.cpp b/CF1554D.cpp
new file mode 100644
index 0000000..6baa41a
--- /dev/null
+++ b/CF1554D.cpp
@@ -0,0 +1,32 @@
+#include<bits/stdc++.h>
+#define LL long long
+
+using namespace std;
+const int N=5e5+100;
+LL n,k,sm; 
+string tmp; 
+
+void solve(){
+    cin >> n  ;
+    string  ans = tmp;
+    LL x = n/2-1; 
+    for(int i =1; i <= x ; i++) {
+            ans  += 'a'; 
+     }
+     ans+='b'; 
+     if (n & 1   &&   n!=1) ans+='c'; 
+     for(int i =1; i <= x+1 ; i++) {
+            ans  += 'a'; 
+     }
+     cout  << ans<< '\n'; 
+    return ;
+}
+int main(){
+    ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
+    int T=1;
+    cin>>T;
+    while(T--){
+        solve();
+    }
+    return 0;
+}
\ No newline at end of file
diff --git a/CF1554D.exe b/CF1554D.exe
new file mode 100644
index 0000000..35d8c08
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