diff --git a/solutions/lc1507.py b/solutions/lc1507.py
new file mode 100644
index 0000000..afdbee5
--- /dev/null
+++ b/solutions/lc1507.py
@@ -0,0 +1,8 @@
+class Solution:
+    def reformatDate(self, date: str) -> str:
+        month = ["Jan", "Feb", "Mar", "Apr", "May", "Jun",
+                 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
+
+        d = date.split(" ")
+
+        return f"{d[2]}-{month.index(d[1])+1:02}-{int(d[0][:-2]):02}"
diff --git a/solutions/lc1909.py b/solutions/lc1909.py
new file mode 100644
index 0000000..8999875
--- /dev/null
+++ b/solutions/lc1909.py
@@ -0,0 +1,17 @@
+class Solution:
+    def canBeIncreasing(self, nums: List[int]) -> bool:
+        bad = 0
+        for i in range(1, len(nums)):
+            if nums[i] <= nums[i - 1]:
+                bad += 1
+
+                if bad > 1:
+                    return False
+
+                l = i == 1 or nums[i] > nums[i - 2]
+                r = i == len(nums) - 1 or nums[i + 1] > nums[i - 1]
+
+                if not l and not r:
+                    return False
+
+        return True
diff --git a/solutions/lc3151.py b/solutions/lc3151.py
new file mode 100644
index 0000000..3d90c80
--- /dev/null
+++ b/solutions/lc3151.py
@@ -0,0 +1,7 @@
+class Solution:
+    def isArraySpecial(self, nums: List[int]) -> bool:
+        for i in range(1, len(nums)):
+            if nums[i] % 2 == nums[i - 1] % 2:
+                return False
+
+        return True
diff --git a/solutions/lc557.py b/solutions/lc557.py
new file mode 100644
index 0000000..0ba2951
--- /dev/null
+++ b/solutions/lc557.py
@@ -0,0 +1,3 @@
+class Solution:
+    def reverseWords(self, s: str) -> str:
+        return " ".join(i[::-1] for i in s.split())