#include <stdio.h>

int main() {
    int A=0;
    int ak = 1;
    int al = 1;
    while (ak == 1) {
        
        A++;
        al = 1;
        while (A % 3 == 1 && al == 1) {
            printf("(");
            al = 0;
        }
        printf("%d",A);
        al = 1;
        while (A % 3 != 0 && A % 2 != 0 && al == 1) {
            printf(" ");
            al = 0;
        }
        al = 1;
        while (A % 2 == 0 && al == 1) {
            printf(")→\n");
            al = 0;
        }
        al = 1;
        while (A % 3 == 0 && al == 1) {
            printf("→");
            al = 0;
        }
        al = 1;
        while (A > 30 && al == 1) {
            ak = 0;
            al = 0;
        }
    }
    printf("end\n");
    return 0;
}

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