Scanner sc = new Scanner(System.in);

int A,d;

int[] B= new int[42];

for(int i=0;i<10;i++){

A = sc.nextInt();

d=A%42;

B[d]++;

}

int c=0;

for(int k=0;k<42;k++){

if(B[k]>=2)

c++;

}

System.out.print((10-c));