tresures.py

treasure_numb = 0 # Start tresures on 0

info = input()
info_list = info.split(" ")
numb_chests = int(info_list[0])
init_pos = int(info_list[1])
instruction_numb = int(info_list[2])

locations = str(input())
locations_list = []
for i in locations:
    locations_list.append(i)

current_pos = init_pos - 1
if locations_list[current_pos] == 'T':
    treasure_numb += 1
else:
    pass

for i in range(instruction_numb):
    command = input()
    command_vals = command.split(" ")
    if command_vals[0].upper() == 'D': # Right
        command_index = current_pos + int(command_vals[1])
        current_pos = command_index
        if locations_list[command_index] == 'T':
            treasure_numb += 1
            locations_list[command_index] = 'V'
        else:
            pass
    if command_vals[0].upper() == 'E': # Left
        command_index = current_pos - int(command_vals[1])
        current_pos = command_index
        if locations_list[command_index] == 'T':
            treasure_numb += 1
            locations_list[command_index] = 'V'
        else:
            pass
    if command_vals[0].upper() == 'V': # Seen 
        pass
            

print(treasure_numb)