#include<iostream>
#include <fstream>
using namespace std;

int main()
{
    int n, v[1009],k=-1 ;
    cin>>n;
    for (int i=1; i<=n; i++)
        cin>>v[i];
    int i=1;
    while (i<n && v[i]==v[i+1])i++;
    if (i==n) k=0;
    else{
    i=1;
    while (i<n && v[i]<=v[i+1])i++;
    if (i==n) k=3;

    i=1;
    while (i<n && v[i]>=v[i+1])i++;
    if (i==n) k=4;

    i=1;
    if(k==3||k==4){
        int kk=0;
        while (i<n){if(v[i]==v[i+1])kk++;i++;}
        if(kk){if(k==3)k=1;else k=2;}
    }
    }


    switch (k) {
        case 0: cout<<"sir constant"; break;
        case 1: cout<<"sir crescator"; break;
        case 2: cout<<"sir descrescator"; break;
        case 3: cout<<"sir strict crescator"; break;
        case 4: cout<<"sir strict descrescator"; break;
        default: cout<<"sir neordonat";
    }
    return 0;
}