题解 | 舞萌时间到！
舞萌时间到！
https://www.nowcoder.com/practice/cef5fe464ca54a10ba1b4374f423f09c
#格式化输入
s = input()
q = int(input())
#字符数值字典，前缀和数组初始化
dx = dict(zip(['P','p','G','g','m'],[3,2,1,0,0]))
ans, dp = 0, []
for c in s:
ans += dx[c]
dp.append(ans)
#输出结果
for _ in range(q):
l, r = map(int,input().split())
if l==1:
print(dp[r-1])
else:
print(dp[r-1]-dp[l-2])
