#include <stdio.h>
 
int main(void) {
    double t1, v1;  // 1つ前
    double t2, v2;  // 現在
    double t3, v3;  // 次のデータ
 
    // 最初の2つを読む
    if (scanf("%lf,%lf", &t1, &v1) != 2) return 0;
    if (scanf("%lf,%lf", &t2, &v2) != 2) return 0;
 
    // 3つ目以降を読みながらピークを探す
    while (scanf("%lf,%lf", &t3, &v3) == 2) {
 
        // 前後より大きければピーク
        if (v2 > v1 && v2 > v3) {
            printf("Peak: time = %.3f, voltage = %.3f\n", t2, v2);
        }
 
        // 値をずらす
        t1 = t2; v1 = v2;
        t2 = t3; v2 = v3;
    }
 
    return 0;
}
 

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