#include <iostream>
using namespace std;
 
int main() {
	string s;
	while (cin >> s) {
		char height = '0';
		int hour = 0, length = s.length(), a = 0, b = length - 1;
		while(height < ':') {
			if (s[a + 1] < s[b - 1]) {
				hour += abs(s[a + 1] - height);
				height = s[a + 1];
				a ++;
			} else if (s[a + 1] > s[b - 1]) {
				hour += abs(s[b - 1] - height);
				height = s[b - 1];
				b --;
			} else {
				hour += abs(s[a + 1] - height);
				height = s[a + 1];
				a ++;b ++;
			}
		}
		cout << hour << endl;
	}
	return 0;
}

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

MDczOjAKMDczNjI6NDUwCjA2NDY0OjM2NDcwCjA4MjcxNzE6Mjg0ODAKMDczNzQ5MToyODE4MAowNTM3NDczNDM3Mjc0NzQ4NDoxODQ2MTgxODY5MTIxMjA=

073:0
07362:450
06464:36470
0827171:28480
0737491:28180
05374734372747484:184618186912120