with open(r'day7/input.txt', 'r') as input:
    lines = input.read().split('\n')[:-1]

active = {lines[0].index('S'):1}

for line in lines[1:]:
    active_buf = {}
    for i in active:
        if line[i] == '^':
            if i > 0:
                active_buf[i-1] = active[i] if i-1 not in active_buf.keys() else active_buf[i-1] + active[i]
            if i < len(line) -1:
                active_buf[i+1] = active[i] if i+1 not in active_buf.keys() else active_buf[i+1] + active[i]
        else:
            active_buf[i] = active[i] if i not in active_buf.keys() else active_buf[i] + active[i]
    active = active_buf

print(sum(active.values()))