#include<stdio.h>
int d[600001];
int l[300001];
int ans[300001];
int main()
{
int n, i;
int a, b, t;
a = b = 10000000;
scanf("%d", &n);
for(i=1; i<=2*n; i++)
{
scanf("%d", d+i);
l[d[i]] = i;
}
for(i=1; i<=2*n; i++)
{
t = l[d[i]];
if(t == i) continue;
if(a <= i) a = 10000000;
if(b <= i) b = 10000000;
if(t > a && t > b)
{
while(1);
printf("IMPOSSIBLE");
return 0;
}
if(t <= a && (a <= b || b < t) )
{
a = t;
ans[d[i]] = 0;
}
else if(t<=b && (b<a || a<t))
{
b = t;
ans[d[i]] = 1;
}
else while(1);
}
for(i=1; i<=2*n; i++) printf("%c", ans[d[i]]==1?'v':'^');
return 0;
}
